阅读说明：本技术 一种高精度芯片光刻机及生产工艺 (High-precision chip photoetching machine and production process ) 是由 胡满 于 2020-12-09 设计创作，主要内容包括：本发明公开了一种高精度芯片光刻机及生产工艺,包括机台,所述机台的上端一侧设有竖架,所述竖架上安装竖电动导轨,所述竖电动导轨的移动端上固定安装有横架,所述横架上固定安装有横电动导轨,所述横电动导轨移动端上安装有激光刻蚀机头,所述机台内部为中空结构,所述机台上台面中部竖直贯穿设有与其转动连接的转轴,所述转轴上端连接有真空载台,所述机台内顶部设有用于驱动转轴的驱动机构,所述机台上台面沿其周向等间距开设有四个导向槽,所述导向槽内固定连接有导向杆,所述导向杆上滑动套接有滑套。本发明可实现对待加工的硅晶片精确的调平,并精确定位固定,实现芯片的高精度加工,满足高精度芯片的加工需要。(The invention discloses a high-precision chip photoetching machine and a production process, and the high-precision chip photoetching machine comprises a machine table, wherein one side of the upper end of the machine table is provided with a vertical frame, a vertical electric guide rail is arranged on the vertical frame, a transverse frame is fixedly arranged on the moving end of the vertical electric guide rail, a transverse electric guide rail is fixedly arranged on the transverse frame, a laser etching machine head is arranged on the moving end of the transverse electric guide rail, the interior of the machine table is of a hollow structure, a rotating shaft which is rotatably connected with the upper table top of the machine table is vertically arranged in the middle of the upper table top in a penetrating manner, the upper end of the rotating shaft is connected with a vacuum platform deck, the top in the machine table is provided with a driving mechanism for driving the rotating shaft, four guide grooves are formed in the upper table top of. The invention can realize the accurate leveling of the silicon wafer to be processed, and the accurate positioning and fixing, realize the high-precision processing of the chip, and meet the processing requirement of the high-precision chip.)

1. A high-precision chip photoetching machine comprises a machine table (1) and is characterized in that a vertical frame (2) is arranged on one side of the upper end of the machine table (1), a vertical electric guide rail (3) is installed on the vertical frame (2), a transverse frame (4) is fixedly installed on the moving end of the vertical electric guide rail (3), a transverse electric guide rail (5) is fixedly installed on the transverse frame (4), a laser etching machine head (6) is installed on the moving end of the transverse electric guide rail (5), the interior of the machine table (1) is of a hollow structure, a rotating shaft (23) in rotating connection with the machine table (1) is vertically arranged in the middle of the upper table top of the machine table (1) in a penetrating mode, a vacuum loading platform (22) is connected to the upper end of the rotating shaft (23), a driving mechanism for driving the rotating shaft (23) is arranged at the top in the machine table (1), and four guide grooves (14), fixedly connected with guide bar (15) in guide way (14), sliding sleeve (16) have been cup jointed in the sliding on guide bar (15), sliding sleeve (16) top is connected with location clamp splice (17), the inside fixed establishment who is connected with location clamp splice (17) that is equipped with of board (1), board (1) upper end opposite side is equipped with leveling mechanism, be equipped with numerical control system (36) on board (1) lateral wall.

2. A high precision chip lithography machine according to claim 1, wherein said driving mechanism comprises a second stepping motor (26) installed at the top inside the machine platform (1), a driving gear (25) is fixedly connected to the end of the output shaft of said second stepping motor (26), a driven gear (24) is fixedly sleeved on said rotating shaft (23), and said driving gear (25) is engaged with said driven gear (24).

3. The high-precision chip lithography machine according to claim 1, wherein the fixing mechanism comprises a mounting seat (29) disposed inside the machine table (1), a second cylinder (30) disposed below the mounting seat (29) is installed at the inner bottom of the machine table (1), the telescopic end of the second cylinder (30) is fixedly connected to the lower end of the mounting seat (29), a movable seat (28) is disposed above the mounting seat (29), the side wall of the movable seat (28) is rotatably connected with four connecting rods (19), the other ends of the four connecting rods (19) are respectively rotatably connected to the bottoms of four sliding sleeves (16), an installation groove is formed in the middle of the upper end of the mounting seat (29), a threaded rod (32) is rotatably connected to the inner bottom of the installation groove, and a worm gear (34) is fixedly connected to the inner portion of the threaded rod (32) located in the installation groove, install worm (35) with worm wheel (34) meshing in the mounting groove, install third step motor (31) of being connected with worm (35) drive on the lateral wall of mount pad (29), threaded rod (32) upwards run through and remove seat (28) and rather than threaded connection, mount pad (29) upper end fixedly connected with gag lever post (27), gag lever post (27) upwards run through and remove seat (28) and rather than sliding connection.

4. The high-precision chip photoetching machine according to claim 1, wherein the leveling mechanism comprises a fixing frame (12) fixedly connected to the upper end of the machine table (1), a rotating rod (11) is rotatably connected to the top of the fixing frame (12), a first stepping motor (13) is installed on the inner side of the fixing frame (12), the output end of the first stepping motor (13) is fixedly connected to the lower end of the rotating rod (11), a cross rod (10) is fixedly connected to the upper end of the rotating rod (11), a first air cylinder (7) is installed at the top of one end, far away from the rotating rod (11), of the cross rod (10), the telescopic end of the first air cylinder (7) penetrates through the cross rod (10) downwards and is fixedly connected with a loop bar (8), and the lower end of the loop bar (8) is fixedly connected with a leveling plate (9.

5. A high precision chip lithography machine according to claim 1, wherein said positioning clamp block (17) is provided with a supporting sheet (18) on its side wall, said supporting sheet (18) being of L-shaped configuration.

6. A high precision chip lithography machine according to claim 1, wherein a distance sensor (20) is provided on the top surface of the machine table (1).

7. A high precision chip lithography machine according to claim 3, wherein two stop rods (27) are provided, and two stop rods (27) are located on either side of the threaded rod (32).

8. A high precision chip lithography machine according to claim 1, wherein a vacuum chuck (21) is embedded in the middle of the upper end of the vacuum stage (22), and a vacuum pump (33) connected to the vacuum chuck (21) is arranged at the bottom inside the machine table (1).

9. A production process of a high-precision chip photoetching machine is characterized by comprising the following steps:

s1, after the silicon wafer to be processed is placed on a vacuum carrying platform (22) of the photoetching machine, a first stepping motor (13) of the photoetching machine is started to drive a rotating rod (11) to rotate, and further drive a cross rod (10) to rotate, so that a leveling plate (9) rotates to the upper side of the silicon wafer;

s2, starting a first cylinder (7) of the photoetching machine to extend to drive a leveling plate (9) to move downwards to be attached to the silicon wafer to level the silicon wafer, so that the silicon wafer is placed flatly;

s3, starting a vacuum pump (33) of the photoetching machine to enable the vacuum sucker (21) to generate negative pressure to adsorb and fix the silicon wafer, and after leveling is completed, starting a first stepping motor (13) to rotate to drive a leveling plate (9) to rotate away;

s4, after the silicon wafer to be processed is placed on a vacuum carrying platform (22) and leveled, the second air cylinder (30) of the photoetching machine is started to contract, so that the mounting base (29) and the moving base (28) are driven to synchronously move downwards, the sliding sleeve (16) is pulled by the connecting rod (19) to move towards the center of the table top of the machine table (1) along the guide rod (15), the four positioning clamping blocks (17) are driven to synchronously move towards the center of the table top of the machine table (1), and the silicon wafer is positioned and clamped;

s5, controlling the vertical electric guide rail (3) and the transverse electric guide rail (5) through the numerical control system (36) of the photoetching machine, and realizing the longitudinal and transverse feeding of the laser etching head (6) to finish the subsequent silicon wafer etching processing.

Technical Field

The invention relates to the technical field of photoetching machines, in particular to a high-precision chip photoetching machine and a production process.

Background

Chips are integrated circuits or microcircuit chips, which are a way in electronics to miniaturize circuits (including primarily semiconductor devices, including passive components, etc.) and are often fabricated on the surface of semiconductor wafers.

The processing of the chip needs to carry out the photoetching of the silicon wafer, but the existing photoetching, in which the silicon wafer is placed unevenly or the silicon wafer is positioned and fixed unstably, directly affects the processing precision and increases the process error, so a high-precision chip photoetching machine and a production process need to be designed.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a high-precision chip photoetching machine and a production process.

In order to achieve the purpose, the invention adopts the following technical scheme:

a high-precision chip photoetching machine comprises a machine table, wherein a vertical frame is arranged on one side of the upper end of the machine table, a vertical electric guide rail is arranged on the vertical frame, a transverse frame is fixedly arranged on the moving end of the vertical electric guide rail, a transverse electric guide rail is fixedly arranged on the transverse frame, a laser etching machine head is arranged on the moving end of the transverse electric guide rail, the interior of the machine table is of a hollow structure, a rotating shaft which is rotatably connected with the upper table top is vertically arranged in the middle of the upper table top in a penetrating manner, a vacuum table top is connected to the upper end of the rotating shaft, a driving mechanism for driving the rotating shaft is arranged at the top in the machine table, four guide grooves are formed in the upper table top at equal intervals along the circumferential direction of the upper table top, guide rods are fixedly connected in the guide grooves, sliding sleeves are slidably sleeved on the guide rods, positioning clamping, the other side of the upper end of the machine table is provided with a leveling mechanism, and the side wall of the machine table is provided with a numerical control system.

Preferably, actuating mechanism is including installing the second step motor at the top in the board, second step motor output shaft end fixedly connected with driving gear, the fixed driven gear that has cup jointed in the pivot, the driving gear meshes with driven gear.

Preferably, the fixing mechanism comprises a mounting seat arranged on the inner side of the machine table, a second air cylinder positioned below the mounting seat is installed at the inner bottom of the machine table, the telescopic end of the second air cylinder is fixedly connected to the lower end of the mounting seat, a moving seat is arranged above the mounting seat, the side wall of the moving seat is rotatably connected with four connecting rods, the other ends of the four connecting rods are respectively rotatably connected to the bottoms of the four sliding sleeves, a mounting groove is formed in the middle of the upper end of the mounting seat, a threaded rod is rotatably connected to the inner bottom of the mounting groove, a worm wheel is fixedly sleeved on the inner side portion of the threaded rod positioned in the mounting groove, a worm meshed with the worm wheel is installed in the mounting groove, a third stepping motor connected with the worm in a driving manner is installed on the side wall of the mounting seat, the, the limiting rod upwards penetrates through the moving seat and is connected with the moving seat in a sliding mode.

Preferably, leveling mechanism includes the mount of fixed connection in board upper end, the mount top is rotated and is connected with the bull stick, first step motor is installed to the mount inboard, the terminal fixed connection of first step motor output is at the bull stick lower extreme, bull stick upper end fixedly connected with horizontal pole, the one end top that the bull stick was kept away from to the horizontal pole is installed first cylinder, the flexible end of first cylinder runs through horizontal pole and fixedly connected with loop bar downwards, the lower extreme fixedly connected with leveling board of loop bar.

Preferably, the side wall of the positioning clamping block is provided with a supporting sheet, and the supporting sheet is of an L-shaped structure.

Preferably, a table top on the machine table is provided with a distance sensor.

Preferably, the limiting rods are two, and the two limiting rods are respectively located on two sides of the threaded rod.

Preferably, a vacuum chuck is embedded in the middle of the upper end of the vacuum carrying platform, and a vacuum pump connected with the vacuum chuck is arranged at the bottom in the machine platform.

A production process of a high-precision chip photoetching machine comprises the following steps:

s1, after the silicon wafer to be processed is placed on a vacuum carrying platform of the photoetching machine, starting a first stepping motor of the photoetching machine to drive a rotating rod to rotate, and further driving a cross rod to rotate, so that a leveling plate rotates to the position above the silicon wafer;

s2, starting a first cylinder of the photoetching machine to extend to drive a leveling plate to move downwards to be attached to the silicon wafer to level the silicon wafer, so that the silicon wafer is placed flatly;

s3, starting a vacuum pump of the photoetching machine to enable the vacuum chuck to generate negative pressure to adsorb and fix the silicon wafer, and starting a first stepping motor to rotate to drive the leveling plate to rotate away after leveling is completed;

s4, after the silicon wafer to be processed is placed on the vacuum carrying platform and leveled, the mounting seat and the moving seat are driven to synchronously move downwards by starting the contraction of the second air cylinder of the photoetching machine, and then the sliding sleeve is pulled by the connecting rod to move towards the center of the table top of the machine along the guide rod, the four positioning clamping blocks are driven to synchronously move towards the center of the table top of the machine, and the silicon wafer is positioned and clamped;

and S5, controlling the vertical electric guide rail and the horizontal electric guide rail through a numerical control system of the photoetching machine to realize the longitudinal and horizontal feeding of the laser etching machine head to finish the subsequent silicon wafer etching processing.

The invention has the beneficial effects that:

through setting up leveling mechanism, will wait that the silicon wafer of processing places the back on the vacuum microscope carrier, start first step motor, drive the bull stick and rotate, and then drive the horizontal pole rotatory for the leveling board rotates to the top of silicon wafer, starts first cylinder extension and drives the leveling board and move down and carry out the leveling with the silicon wafer laminating to it, makes the silicon wafer level and puts, guarantees the high accuracy processing of follow-up chip.

Through setting up location clamp splice, guide bar, sliding sleeve, fixed establishment, place the silicon wafer of treating processing on the vacuum microscope carrier after the leveling, through starting the shrink of second cylinder, can drive the mount pad, move the seat and move down in step, and then through connecting rod pulling sliding sleeve to the center of table mesa along the guide bar, can drive four location clamp splices and move to table mesa center in step, and then press from both sides the silicon wafer location, and then guarantee the stability of follow-up chip processing, realize the high accuracy processing of chip.

The invention can realize the accurate leveling of the silicon wafer to be processed, and the accurate positioning and fixing, realize the high-precision processing of the chip, and meet the processing requirement of the high-precision chip.

Drawings

FIG. 1 is a schematic structural diagram of a high-precision chip lithography machine according to the present invention;

FIG. 2 is a schematic structural diagram of an upper table surface of a high-precision chip lithography machine according to the present invention;

FIG. 3 is a schematic structural diagram of a mounting seat, a worm wheel, a worm and a third stepping motor of the high-precision chip lithography machine according to the present invention.

In the figure: the laser etching machine comprises a machine table 1, a vertical frame 2, a vertical electric guide rail 3, a transverse frame 4, a transverse electric guide rail 5, a laser etching machine head 6, a first air cylinder 7, a sleeve rod 8, a leveling plate 9, a transverse rod 10, a rotating rod 11, a fixed frame 12, a first stepping motor 13, a guide groove 14, a guide rod 15, a sliding sleeve 16, a positioning clamping block 17, a supporting sheet 18, a connecting rod 19, a distance sensor 20, a vacuum suction cup 21, a vacuum carrying table 22, a rotating shaft 23, a driven gear 24, a driving gear 25, a second stepping motor 26, a limiting rod 27, a movable seat 28, a mounting seat 29, a second air cylinder 30, a third stepping motor 31, a threaded rod 32, a vacuum pump 33, a worm gear 34, a worm gear 35 and a numerical control.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-3, a high-precision chip lithography machine comprises a machine table 1, wherein a vertical frame 2 is arranged on one side of the upper end of the machine table 1, a vertical electric guide rail 3 is arranged on the vertical frame 2, a transverse frame 4 is fixedly arranged on the moving end of the vertical electric guide rail 3, a transverse electric guide rail 5 is fixedly arranged on the transverse frame 4, a laser etching machine head 6 is arranged on the moving end of the transverse electric guide rail 5, the interior of the machine table 1 is of a hollow structure, a rotating shaft 23 which is rotatably connected with the machine table 1 is vertically arranged in the middle of the upper surface of the machine table 1 in a penetrating manner, a vacuum carrier 22 is connected with the upper end of the rotating shaft 23, a vacuum chuck 21 is embedded in the middle of the upper end of the vacuum carrier 22, a vacuum pump 33 which is connected with the vacuum chuck 21 is arranged at the bottom of the machine table 1, the vacuum chuck 21 can, starting a vacuum pump 33 to enable a vacuum suction disc 21 to generate negative pressure to adsorb and fix a silicon wafer, arranging a distance sensor 20 on the upper table surface of a machine table 1, placing the silicon wafer on a vacuum carrying table 22, monitoring the distance between the silicon wafer and the machine table 1 through the distance sensor 20 when the silicon wafer is leveled, and providing reference for leveling the silicon wafer, arranging a driving mechanism for driving a rotating shaft 23 at the top in the machine table 1, arranging four guide grooves 14 on the upper table surface of the machine table 1 at equal intervals along the circumferential direction of the upper table surface, fixedly connecting guide rods 15 in the guide grooves 14, slidably sleeving a sliding sleeve 16 on the guide rods 15, connecting positioning clamping blocks 17 at the tops of the sliding sleeves 16, arranging a fixing mechanism connected with the positioning clamping blocks 17 in the machine table 1, arranging a leveling mechanism at the other side of the upper end of the machine table 1, arranging a numerical control system 36 on the side wall of, The rotation period, angle, speed and other parameters of the second stepping motor 26 and the third stepping motor 31 control the start, stop and action of the vacuum pump 33, the first cylinder 7 and the second cylinder 30.

In the invention, the driving mechanism comprises a second stepping motor 26 arranged at the inner top of the machine table 1, the tail end of an output shaft of the second stepping motor 26 is fixedly connected with a driving gear 25, a driven gear 24 is fixedly sleeved on the rotating shaft 23, and the driving gear 25 is meshed with the driven gear 24.

Specifically, the fixing mechanism comprises an installation seat 29 arranged on the inner side of the machine table 1, a second air cylinder 30 positioned below the installation seat 29 is arranged at the inner bottom of the machine table 1, the telescopic end of the second air cylinder 30 is fixedly connected to the lower end of the installation seat 29, a moving seat 28 is arranged above the installation seat 29, the side wall of the moving seat 28 is rotatably connected with four connecting rods 19, the other ends of the four connecting rods 19 are respectively rotatably connected to the bottoms of the four sliding sleeves 16, an installation groove is formed in the middle of the upper end of the installation seat 29, a threaded rod 32 is rotatably connected to the inner bottom of the installation groove, a worm wheel 34 is fixedly sleeved on the inner side portion of the threaded rod 32, a worm 35 meshed with the worm wheel 34 is arranged in the installation groove, a third stepping motor 31 in driving connection with the worm 35 is arranged on the side wall of the installation seat 29, the, the limiting rods 27 penetrate through the moving seat 28 upwards and are connected with the moving seat in a sliding manner, two limiting rods 27 are arranged, the two limiting rods 27 are respectively positioned at two sides of the threaded rod 32, the two limit rods 27 limit the up-and-down movement of the movable base 28 from two sides, so as to ensure that the up-and-down movement of the movable base 28 is more stable, when the silicon wafers with different diameter specifications are fixed, the worm 35 can be driven to rotate by starting the third stepping motor 31, and since the worm 35 is meshed with the worm wheel 34, the worm wheel 34 can be driven to rotate, the threaded rod 32 can be driven to rotate, the movable seat 28 can be driven to move along the limiting rod 27, namely, the third stepping motor 31 is controlled to rotate forwards or reversely, so that the moving seat 28 can be driven to move upwards or downwards, the connecting rod 19 drives the sliding sleeve 16 to move on the guide rod 15, the radial position of the positioning clamp block 17 on the table top of the machine table 1 can be preset, and the positioning and fixing requirements of silicon wafers with different diameters and specifications are met.

Specifically, the leveling mechanism comprises a fixed frame 12 fixedly connected to the upper end of the machine table 1, the top of the fixed frame 12 is rotatably connected with a rotating rod 11, a first stepping motor 13 is installed on the inner side of the fixed frame 12, the output end of the first stepping motor 13 is fixedly connected to the lower end of the rotating rod 11, the upper end of the rotating rod 11 is fixedly connected with a cross rod 10, a first air cylinder 7 is installed at the top of one end, away from the rotating rod 11, of the cross rod 10, the telescopic end of the first air cylinder 7 downwards penetrates through the cross rod 10 and is fixedly connected with a sleeve rod 8, the lower end of the sleeve rod 8 is fixedly connected with a leveling plate 9, after a silicon wafer to be processed is placed on a vacuum carrying platform 22, the first stepping motor 13 is started to drive the rotating rod 11 to rotate so as to drive the cross rod 10 to rotate, the leveling plate 9 is made to rotate to the upper, ensuring the high-precision processing of the subsequent chip, starting the vacuum pump 33 to enable the vacuum sucker 21 to generate negative pressure to adsorb and fix the silicon wafer, and after the leveling is finished, starting the first stepping motor 13 to rotate to drive the leveling plate 9 to rotate away.

Specifically, the side wall of the positioning clamping block 17 is provided with a supporting sheet 18, the supporting sheet 18 is of an L-shaped structure, and the edge of the silicon wafer is effectively supported and supported, so that the silicon wafer is positioned and fixed more stably and accurately.

A production process of a high-precision chip photoetching machine comprises the following steps:

after a silicon wafer to be processed is placed on a vacuum carrying platform 22, a first stepping motor 13 is started to drive a rotating rod 11 to rotate, so that a cross rod 10 is driven to rotate, a leveling plate 9 is driven to rotate to the upper side of the silicon wafer, a first air cylinder 7 is started to extend to drive the leveling plate 9 to move downwards to be attached to the silicon wafer for leveling the silicon wafer, the silicon wafer is placed flatly, high-precision processing of a subsequent chip is guaranteed, a vacuum pump 33 is started to enable a vacuum suction disc 21 to generate negative pressure to adsorb and fix the silicon wafer, and after leveling is completed, the first stepping motor 13 is started to rotate to drive the leveling plate 9 to rotate away;

then after the silicon wafer to be processed is placed on the vacuum carrying platform 22 and leveled, the second air cylinder 30 is started to contract, so that the mounting base 29 and the moving base 28 can be driven to synchronously move downwards, the connecting rod 19 pulls the sliding sleeve 16 to move towards the center of the table top of the machine table 1 along the guide rod 15, the four positioning clamping blocks 17 can be driven to synchronously move towards the center of the table top of the machine table 1, the silicon wafer is positioned and clamped, the subsequent chip processing stability is further ensured, and the high-precision processing of the chip is realized;

and then the vertical electric guide rail 3 and the horizontal electric guide rail 5 are controlled by the numerical control system 36, so that the laser etching machine head 6 can longitudinally and transversely feed to finish the subsequent silicon wafer etching processing.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.