阅读说明：本技术 一种基于紫外激光掩模刻蚀的微流控芯片结构 (Micro-fluidic chip structure based on ultraviolet laser mask etching ) 是由 张红宾 于 2019-09-05 设计创作，主要内容包括：本发明提供一种基于紫外激光掩模刻蚀的微流控芯片结构,包括上层片基和下层片基；微流控芯片经由上层片基和下层片基共同组成。当研究人员通过使用本申请文件所设计的微流控芯片完成核酸检测后,研究人员可将两组夹紧式断裂装置放置于本申请文件所设计的微流控芯片前后两端,并给予压力,使得两组夹紧式断裂装置向内夹紧,这时两组夹紧式断裂装置中的等腰三角形凸起块将给予上层片基前后两端面所开设的第一等腰三角形缺口结构压力,在等腰三角形凸起块的作用力下,第一等腰三角形缺口结构部位同纵向激光切口结构开裂,从而断裂开保留相对于上层片基底端面基于紫外激光掩模刻蚀的微型沟道部位的上层片基区域,使得微通道破损无法再次使用。(The invention provides a micro-fluidic chip structure based on ultraviolet laser mask etching, which comprises an upper layer piece base and a lower layer piece base; the microfluidic chip is composed of an upper layer sheet base and a lower layer sheet base. After the researcher completes the nucleic acid detection by using the microfluidic chip designed by the application document, the researcher can place two groups of clamping type fracture devices at the front end and the rear end of the microfluidic chip designed by the application document, and apply pressure to clamp the two groups of clamping type fracture devices inwards, at the moment, the isosceles triangle protrusion blocks in the two groups of clamping type fracture devices apply pressure to the first isosceles triangle notch structure formed on the front end surface and the rear end surface of the upper layer substrate, and under the acting force of the isosceles triangle protrusion blocks, the first isosceles triangle notch structure part is cracked with the longitudinal laser notch structure, so that the upper layer substrate area of the micro channel part etched on the basis of an ultraviolet laser mask relative to the end surface of the upper layer substrate is cracked and reserved, and the micro channel can not be used again due to the damage.)

1. A micro-fluidic chip structure based on ultraviolet laser mask etching is characterized in that: the microfluidic chip structure based on ultraviolet laser mask etching comprises an upper layer substrate, a longitudinal laser notch structure, a first isosceles triangular notch structure, a circular limiting groove, a rectangular through hole, a second isosceles triangular notch structure, a rectangular notch structure, a clamping type fracture device accommodating groove, a micro channel, a limiting shaft nail, a clamping type fracture device, a rectangular strip block, an isosceles triangular convex block, a circular limiting column, a miniature circular through hole and a lower layer substrate;

the microfluidic chip is composed of an upper layer piece base and a lower layer piece base together, and a micro channel etched on the end face of the upper layer piece base based on an ultraviolet laser mask and a micro channel etched on the top end face of the lower layer piece base based on the ultraviolet laser mask form a micro channel together; the longitudinal middle part of the top end surface of the upper layer sheet base is provided with a longitudinal laser incision structure based on laser cutting, the longitudinal laser incision structure does not completely penetrate through the upper layer sheet base, and a micro channel part etched on the basis of an ultraviolet laser mask relative to the end surface of the upper layer sheet base is reserved; the front end surface and the rear end surface of the upper layer sheet base are provided with a first isosceles triangle notch structure which penetrates through the top end surface and the bottom end surface of the upper layer sheet base relative to the longitudinal laser incision structure; the front end surface and the rear end surface of the upper sheet base are provided with a round limiting groove adjacent to the left side and the right side of the first isosceles triangular notch structure; the left half part of the top end face of the upper layer slice substrate is symmetrically provided with two clamping type fracture device accommodating grooves in a front-back manner, and the two clamping type fracture device accommodating grooves are far away from a micro channel region etched on the basis of an ultraviolet laser mask on the end face of the upper layer slice substrate.

2. The microfluidic chip structure based on ultraviolet laser mask etching according to claim 1, wherein: the clamping type fracture device containing groove is formed by a rectangular through hole, a second isosceles triangular notch structure and a rectangular notch structure, wherein the rectangular through hole penetrates through the top end face and the bottom end face of the upper substrate, the second isosceles triangular notch structure is arranged in the middle of the long side face of the inner end of the rectangular through hole, and the rectangular notch structure is arranged on the left side and the right side of the long side face, which are adjacent to the second isosceles triangular notch structure.

3. The microfluidic chip structure based on ultraviolet laser mask etching according to claim 1, wherein: the two clamping type fracture device accommodating grooves are internally provided with a group of clamping type fracture devices, and the clamping type fracture devices are composed of rectangular strips, isosceles triangle protruding blocks, round limiting columns and miniature round through holes.

4. The microfluidic chip structure based on ultraviolet laser mask etching according to claim 1, wherein: the size of the rectangular bar block is consistent with that of the rectangular through hole, the middle part of the long side end face of the rectangular bar block is provided with an isosceles triangle protruding block which is consistent with the size of the second isosceles triangle gap structure, and the left side and the right side of the long side end face, which are adjacent to the isosceles triangle protruding block, are provided with a rectangular gap structure, the diameter and the length of which are consistent with the width and the length of the rectangular gap structure.

5. The microfluidic chip structure based on ultraviolet laser mask etching according to claim 1, wherein: the center part of the top end face of the rectangular bar block is provided with a miniature circular through hole which penetrates through the top end face and the bottom end face of the rectangular bar block, and the diameter of the miniature circular through hole is three millimeters.

6. The microfluidic chip structure based on ultraviolet laser mask etching according to claim 1, wherein: the distance between the two circular limiting grooves formed in the front end face and the rear end face of the upper substrate is consistent with the distance between the two circular limiting columns in the clamping type breaking device accommodating groove.

7. The microfluidic chip structure based on ultraviolet laser mask etching according to claim 1, wherein: the diameter of the circular limiting groove is consistent with that of the circular limiting column, but the depth of the circular limiting groove is larger than the length of the circular limiting column.

8. The microfluidic chip structure based on ultraviolet laser mask etching according to claim 1, wherein: the vertex angle of the isosceles triangle-shaped convex block in the clamping type fracture device accommodating groove is consistent with that of the first isosceles triangle notch structure, but the length of the bottom side of the isosceles triangle-shaped convex block is greater than that of the first isosceles triangle notch structure.

9. The microfluidic chip structure based on ultraviolet laser mask etching according to claim 1, wherein: and the limiting shaft nail is fixedly connected between the edge included angles of the upper layer sheet base and the lower layer sheet base.

Technical Field

The invention belongs to the technical field of microfluidic chips, and particularly relates to a microfluidic chip structure based on ultraviolet laser mask etching.

Background

The micro-fluidic chip technology integrates basic operation units of sample preparation, reaction, separation, detection and the like in the biological, chemical and medical analysis process into a micron-scale chip, and automatically completes the whole analysis process. Due to its great potential in the fields of biology, chemistry, medicine and the like, the method has been developed into a new research field crossing the disciplines of biology, chemistry, medicine, fluid, electronics, materials, machinery and the like.

For example, application No.: 201821113168.3 discloses a micro-fluidic chip, relating to the technical field of micro-fluidic chips and aiming at solving the technical problem that the output of the detection result of the existing micro-fluidic chip needs to depend on larger equipment such as a scanner, a color development processing device and the like. The micro-fluidic chip comprises a chip body, wherein the chip body comprises a sample adding area, a first sealing cavity, a second sealing cavity, a communicating flow channel and a result output flow channel, the first sealing cavity, the second sealing cavity, the communicating flow channel and the result output flow channel are all arranged inside the chip body, the first end of the communicating flow channel is communicated with the sample adding area, the second end of the communicating flow channel is communicated with the second sealing cavity, the first sealing cavity is located on the communicating flow channel, the result output flow channel is communicated with the second sealing cavity, and the result output flow channel is located in a visible area of the chip body.

Based on the search of the above patent and the discovery of the equipment in the prior art, when the existing sample detection side with high sensitivity for nucleic acid detection is used, if the micro-fluidic chip is reused, a small amount of sample detected last time is necessary to remain in the micro-fluidic chip, and even if only a few copies of the residual DNA can be detected due to the high sensitivity, the subsequent detection result is inaccurate; however, the microfluidic chip used for the sample detection side with high sensitivity for nucleic acid detection and the like is expensive, so that a leak is drilled by an illegal merchant, the used microfluidic chip is packaged and sold for reuse, and a detection result is inaccurate when the sample detection side with high sensitivity for nucleic acid detection and the like is used because a researcher cannot directly distinguish by naked eyes; if the mode such as beating breakage is adopted to prevent the reuse of the used micro-fluidic chip, a large amount of broken scraps can be generated due to beating breakage, potential safety hazards exist, and the micro-fluidic chip is not easy to clean.

Therefore, in view of the above, research and improvement are made on the existing structure and defects, and a micro-fluidic chip structure based on ultraviolet laser mask etching is provided, so as to achieve the purpose of higher practical value.

Disclosure of Invention

In order to solve the technical problems, the invention provides a micro-fluidic chip structure based on ultraviolet laser mask etching, which aims to solve the problems that a micro-fluidic chip on a sample detection side with high sensitivity for nucleic acid detection and the like is expensive, so that illegal merchants can drill a leak, the used micro-fluidic chip is packaged and sold for reuse for the second time, and the detection result is inaccurate when the sample detection side with high sensitivity for nucleic acid detection and the like is used because researchers cannot directly distinguish with naked eyes.

The invention relates to a micro-fluidic chip structure based on ultraviolet laser mask etching, which is achieved by the following specific technical means:

a microfluidic chip structure based on ultraviolet laser mask etching comprises an upper substrate, a longitudinal laser notch structure, a first isosceles triangular notch structure, a circular limiting groove, a rectangular through hole, a second isosceles triangular notch structure, a rectangular notch structure, a clamping type fracture device accommodating groove, a micro channel, a limiting shaft nail, a clamping type fracture device, a rectangular strip block, an isosceles triangular convex block, a circular limiting column, a miniature circular through hole and a lower substrate;

the microfluidic chip is composed of an upper layer piece base and a lower layer piece base together, and a micro channel etched on the end face of the upper layer piece base based on an ultraviolet laser mask and a micro channel etched on the top end face of the lower layer piece base based on the ultraviolet laser mask form a micro channel together; the longitudinal middle part of the top end surface of the upper layer sheet base is provided with a longitudinal laser incision structure based on laser cutting, the longitudinal laser incision structure does not completely penetrate through the upper layer sheet base, and a micro channel part etched on the basis of an ultraviolet laser mask relative to the end surface of the upper layer sheet base is reserved; the front end surface and the rear end surface of the upper layer sheet base are provided with a first isosceles triangle notch structure which penetrates through the top end surface and the bottom end surface of the upper layer sheet base relative to the longitudinal laser incision structure; the front end surface and the rear end surface of the upper sheet base are provided with a round limiting groove adjacent to the left side and the right side of the first isosceles triangular notch structure; the left half part of the top end face of the upper layer slice substrate is symmetrically provided with two clamping type fracture device accommodating grooves in a front-back manner, and the two clamping type fracture device accommodating grooves are far away from a micro channel region etched on the basis of an ultraviolet laser mask on the end face of the upper layer slice substrate.

Furthermore, the clamping type fracture device accommodating groove is formed by a rectangular through hole, a second isosceles triangular notch structure and a rectangular notch structure, wherein the rectangular through hole penetrates through the top end face and the bottom end face of the upper substrate, the second isosceles triangular notch structure is arranged in the middle of the long side face of the inner end of the rectangular through hole, and the rectangular notch structure is arranged on the left side and the right side of the long side face, which are adjacent to the second isosceles triangular notch structure.

Furthermore, a group of clamping type fracture devices are contained in the two clamping type fracture device containing grooves, and the clamping type fracture devices are composed of rectangular strips, isosceles triangle protruding blocks, circular limiting columns and miniature circular through holes.

Furthermore, the size of the rectangular bar block is consistent with that of the rectangular through hole, the middle part of the long side end face of the rectangular bar block is provided with an isosceles triangle protruding block which is consistent with the size of the second isosceles triangle gap structure, and the left side and the right side of the long side end face, which are adjacent to the isosceles triangle protruding block, are provided with a rectangular gap structure, the diameter and the length of which are consistent with the width and the length of the rectangular gap structure.

Furthermore, a miniature circular through hole penetrating through the top end face and the bottom end face of the rectangular bar block is formed in the center of the top end face of the rectangular bar block, and the diameter of the miniature circular through hole is three millimeters.

Furthermore, the distance between the two circular limiting grooves formed in the front end surface and the rear end surface of the upper sheet base is consistent with the distance between the two circular limiting columns in the clamping type fracture device accommodating groove.

Furthermore, the diameter of the circular limiting groove is consistent with that of the circular limiting column, but the depth of the circular limiting groove is larger than the length of the circular limiting column.

Furthermore, the vertex angle of the isosceles triangle-shaped convex block in the holding groove of the clamping type fracture device is consistent with the vertex angle of the first isosceles triangle-shaped gap structure, but the length of the bottom side of the isosceles triangle-shaped convex block is greater than that of the first isosceles triangle-shaped gap structure.

Furthermore, the limiting shaft nail is fixedly connected between the edge included angles of the upper layer sheet base and the lower layer sheet base.

Compared with the prior art, the invention has the following beneficial effects:

after the researcher completes the nucleic acid detection by using the microfluidic chip designed in the application document, in order to avoid that lawless persons drill leak holes and reuse the used microfluidic chip for secondary sale, the researcher can place two groups of clamping type breaking devices at the front end and the rear end of the microfluidic chip designed in the application document and apply pressure to clamp the two groups of clamping type breaking devices inwards, at the moment, the isosceles triangle convex blocks in the two groups of clamping type breaking devices apply pressure to the first isosceles triangle notch structures arranged on the front end surface and the rear end surface of the upper layer sheet base, under the action force of the isosceles triangle convex blocks, the first isosceles triangle notch structures are cracked with the longitudinal laser notch structures, so that the upper layer sheet base area of the micro channel part etched on the basis of the ultraviolet laser mask relative to the end surface of the upper layer sheet base is cracked and reserved, so that the microchannel is broken and cannot be reused.

The vertical laser incision structure that this application file designed link up the upper film base incompletely, it remains for the miniature channel position of upper film base terminal surface based on ultraviolet laser mask sculpture, so when the effort through the isosceles triangle protruding piece with first isosceles triangle breach structure position with vertical laser incision structure fracture back, its fracture position area is little, the event can not cause broken bits, hit the breakage with traditional beating and prevent the reuse mode and compare, can not appear because of there being the potential safety hazard in a large number of broken bits and the emergence of the difficult clearance condition.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic top view of the present invention.

FIG. 2 is a partial cross-sectional view of A-A of FIG. 1 according to the present invention.

FIG. 3 is a schematic view of the present invention in partial section taken along line B-B in FIG. 1.

Fig. 4 is a schematic front view of the present invention.

Fig. 5 is a schematic view of the clamp-type breaking apparatus of fig. 1 according to the present invention in a disassembled state.

Fig. 6 is a schematic axial view of the clamp-type breaking device of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. an upper substrate; 101. a longitudinal laser cut structure; 102. a first isosceles triangular gap structure; 103. a circular limiting groove; 104. a rectangular through hole; 105. a second isosceles triangle notch structure; 106. a rectangular notch structure; 107. a clamping-type breaking device receiving groove; 2. a microchannel; 3. limiting shaft nails; 4. a clamp-on fracture device; 401. a rectangular bar; 402. an isosceles triangle convex block; 403. a circular limiting column; 404. a miniature circular through hole; 5. the lower layer is a substrate.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

As shown in figures 1 to 6:

the invention provides a micro-fluidic chip structure based on ultraviolet laser mask etching, which comprises an upper layer substrate 1, a longitudinal laser incision structure 101, a first isosceles triangular gap structure 102, a circular limiting groove 103, a rectangular through hole 104, a second isosceles triangular gap structure 105, a rectangular gap structure 106, a clamping type fracture device accommodating groove 107, a micro-channel 2, a limiting shaft nail 3, a clamping type fracture device 4, a rectangular strip 401, an isosceles triangular raised block 402, a circular limiting column 403, a miniature circular through hole 404 and a lower layer substrate 5;

the microfluidic chip is composed of an upper sheet substrate 1 and a lower sheet substrate 5 together, and a micro channel 2 is formed by the micro channel etched on the basis of an ultraviolet laser mask on the bottom end face of the upper sheet substrate 1 and the micro channel etched on the basis of an ultraviolet laser mask on the top end face of the lower sheet substrate 5 together; the longitudinal middle part of the top end surface of the upper piece substrate 1 is provided with one longitudinal laser incision structure 101 based on laser incision, the longitudinal laser incision structure 101 does not completely penetrate through the upper piece substrate 1, and a micro channel part etched on the basis of an ultraviolet laser mask relative to the bottom end surface of the upper piece substrate 1 is reserved; the front end surface and the rear end surface of the upper layer sheet base 1 are provided with a first isosceles triangle notch structure 102 penetrating through the top end surface and the bottom end surface of the upper layer sheet base 1 relative to the longitudinal laser incision structure 101; the left side and the right side of the front end surface and the rear end surface of the upper layer substrate 1, which are adjacent to the first isosceles triangular notch structure 102, are provided with the circular limiting grooves 103; the left half part of the top end face of the upper layer sheet base 1 is symmetrically provided with two clamping type fracture device accommodating grooves 107 in a front-back manner, and the two clamping type fracture device accommodating grooves 107 are far away from a micro channel area etched on the basis of an ultraviolet laser mask on the bottom end face of the upper layer sheet base 1.

The clamping type breaking device receiving groove 107 is formed by a rectangular through hole 104, a second isosceles triangular notch structure 105 and a rectangular notch structure 106, wherein the rectangular through hole 104 penetrates through the top end face and the bottom end face of the upper substrate 1, the second isosceles triangular notch structure 105 is arranged in the middle of the long side face of the inner end of the rectangular through hole 104, and the rectangular notch structure 106 is arranged on the left side and the right side of the long side face, which are adjacent to the second isosceles triangular notch structure 105.

A set of clamping type breaking devices 4 is contained in the two clamping type breaking device containing grooves 107, and the clamping type breaking devices 4 are composed of rectangular bars 401, isosceles triangle protruding blocks 402, circular limiting columns 403 and miniature circular through holes 404.

The size of the rectangular bar block 401 is consistent with that of the rectangular through hole 104, the middle part of the long side end face of the rectangular bar block 401 is provided with an isosceles triangular protruding block 402 with the size consistent with that of the second isosceles triangular gap structure 105, and the left side and the right side of the long side end face adjacent to the isosceles triangular protruding block 402 are provided with a rectangular gap structure 106 with the diameter and the length consistent with those of the rectangular gap structure 106.

The center of the top end face of the rectangular bar 401 is provided with a miniature circular through hole 404 penetrating through the top end face and the bottom end face of the rectangular bar 401, the diameter of the miniature circular through hole 404 is three millimeters, and researchers can insert sharp objects such as needles into the miniature circular through holes 404 penetrating through the top end face and the bottom end face of the rectangular bar 401 in the clamping type breaking devices 4, so that the two groups of clamping type breaking devices 4 are respectively pulled out from the two clamping type breaking device accommodating grooves 107.

The distance between the two circular limiting grooves 103 formed in the front end surface and the rear end surface of the upper substrate 1 is consistent with the distance between the two circular limiting columns 403 in the clamping fracture device accommodating groove 107.

The diameter of the circular limiting groove 103 is consistent with that of the circular limiting column 403, but the depth of the circular limiting groove 103 is greater than that of the circular limiting column 403, the two groups of clamping fracture devices 4 are placed at the front end and the rear end of the microfluidic chip designed in the application document, and the two circular limiting columns 403 in the two groups of clamping fracture devices 4 are respectively aligned to the circular limiting grooves 103 formed in the front end face and the rear end face of the upper substrate 1 and inserted into the circular limiting grooves to limit the positions of the clamping fracture devices 4.

Wherein, the vertex angle of the isosceles triangle bump 402 in the clamping type breaking device receiving groove 107 is consistent with the vertex angle of the first isosceles triangle gap structure 102, but the length of the bottom side of the isosceles triangle bump 402 is larger than that of the first isosceles triangle gap structure 102, the isosceles triangle bump 402 in the two groups of clamping type breaking devices 4 will give pressure to the first isosceles triangle gap structure 102 arranged on the front and back end faces of the upper sheet base 1, because the longitudinal middle part of the top end face of the upper sheet base 1 is provided with a longitudinal laser incision structure 101 based on laser cutting, and the longitudinal laser incision structure 101 is not completely penetrated through the upper sheet base 1, it remains the micro-channel part etched based on the ultraviolet laser mask relative to the bottom end face of the upper sheet base 1, therefore, under the acting force of the isosceles triangle bump 402, the first isosceles triangle gap structure 102 cracks with the longitudinal laser incision structure 101, thereby breaking the upper layer substrate 1 area of the micro-channel part etched on the basis of the ultraviolet laser mask relative to the bottom end surface of the upper layer substrate 1, and leading the micro-channel 2 to be damaged and not to be used again.

The limiting shaft nails 3 are fixedly connected between the edge included angles of the upper sheet base 1 and the lower sheet base 5, so that after the upper sheet base 1 is broken, the upper sheet base cannot be separated from the lower sheet base through the four limiting shaft nails 3.

The specific use mode and function of the embodiment are as follows:

after a researcher finishes sample detection with high sensitivity and the like by using the microfluidic chip designed in the application document, in order to avoid a lawless person from drilling a leak and reutilize the used microfluidic chip for secondary sale, the researcher can insert sharp objects such as needles and the like into the miniature circular through holes 404 penetrating through the top end surface and the bottom end surface of the rectangular bar 401 in the clamping fracture devices 4, so that the two groups of clamping fracture devices 4 are respectively pulled out from the two clamping fracture device accommodating grooves 107, then the two groups of clamping fracture devices 4 are respectively placed at the front end and the rear end of the microfluidic chip designed in the application document, two circular limiting columns 403 in the two groups of clamping fracture devices 4 are respectively aligned with and inserted into the circular limiting grooves 103 formed in the front end surface and the rear end surface of the upper substrate 1 to limit the positions of the clamping fracture devices 4, at this time, the researchers can hold two groups of clamping type breaking devices 4 together by two hands and apply pressure to make the two groups of clamping type breaking devices 4 clamp inwards, at this time, the isosceles triangle convex blocks 402 in the two groups of clamping type breaking devices 4 apply pressure to the first isosceles triangle gap structures 102 arranged on the front and back end faces of the upper sheet base 1, because the longitudinal middle part of the top end face of the upper sheet base 1 is provided with a longitudinal laser notch structure 101 based on laser cutting, and the longitudinal laser notch structure 101 does not completely penetrate through the upper sheet base 1, it retains the micro-channel part etched on the basis of the ultraviolet laser mask relative to the bottom end face of the upper sheet base 1, under the acting force of the isosceles triangle convex blocks 402, the first isosceles triangle gap structure 102 is cracked with the longitudinal laser notch structure 101, thereby the upper sheet base 1 region etched on the basis of the ultraviolet laser mask relative to the bottom end face of the upper sheet base 1 is broken and retained, so that the microchannel 2 is damaged and cannot be used again;

because the longitudinal laser incision structure 101 does not completely penetrate through the upper layer substrate 1, a micro channel part etched on the basis of an ultraviolet laser mask relative to the bottom end face of the upper layer substrate 1 is reserved, the area of the cracked part is small after the first isosceles triangle notch structure 102 and the longitudinal laser incision structure 101 are cracked by the acting force of the isosceles triangle protruding blocks 402, broken scraps cannot be caused, and the limit shaft nails 3 are fixedly connected between the edge included angles of the four positions of the upper layer substrate 1 and the lower layer substrate 5 together, so that the separation phenomenon cannot occur through the arrangement of the four limit shaft nails 3 after the upper layer substrate 1 is cracked.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.