阅读说明：本技术 传输线、电子设备及传输线的制造方法 (Transmission line, electronic device, and method for manufacturing transmission line ) 是由 陈勇利 王建安 许心影 梁悦 于 2019-12-20 设计创作，主要内容包括：本发明提供了一种传输线、电子设备及传输线的制造方法,传输线包括第一基材层、设于第一基材层的一侧的第一信号线以及埋设于第一基材层的第二信号线,传输线还包括贯穿第一基材层的第一通孔以电连接第一信号线和第二信号线,第一基材层的另一侧对应第一通孔的位置向靠近第一信号线方向凹陷形成一隔离槽,以去除第一通孔的一部分；传输线还包括一覆盖隔离槽的补强板,补强板包括与第一基材层叠设的第二基材层以及设于第二基材层靠近第一基材层一侧的第一接地层。本发明提供的传输线,在基材层中设置通孔,可达到更小的直径,为传输线的阻抗调节提供更多的空间,且加工过程更简单,良率高,大大提高了传输线的优良率。(The invention provides a transmission line, electronic equipment and a manufacturing method of the transmission line, wherein the transmission line comprises a first substrate layer, a first signal line arranged on one side of the first substrate layer and a second signal line embedded in the first substrate layer; the transmission line also comprises a reinforcing plate covering the isolation groove, and the reinforcing plate comprises a second base material layer stacked with the first base material layer and a first grounding layer arranged on one side, close to the first base material layer, of the second base material layer. According to the transmission line provided by the invention, the through holes are formed in the substrate layer, so that the diameter is smaller, more space is provided for impedance adjustment of the transmission line, the processing process is simpler, the yield is high, and the yield of the transmission line is greatly improved.)

1. A transmission line comprises a first substrate layer, a first signal line arranged on one side of the first substrate layer and a second signal line buried in the first substrate layer, and is characterized by further comprising a first through hole penetrating through the first substrate layer to be electrically connected with the first signal line and the second signal line, wherein the other side of the first substrate layer is recessed towards the direction close to the first signal line corresponding to the position of the first through hole to form an isolation groove so as to remove a part of the first through hole; the transmission line still includes one and covers the stiffening plate of isolation groove, the stiffening plate include with the range upon range of second substrate layer of establishing of first substrate layer and locate the second substrate layer is close to the first ground plane of first substrate layer one side.

2. The transmission line of claim 1, wherein the bottom of the isolation slot meets the level of the second signal line.

3. The transmission line of claim 1, wherein the stiffener further comprises a second ground plane disposed on a side of the second substrate layer away from the first substrate layer, and a plurality of second vias communicating the first ground plane and the second ground plane, the second vias being disposed around the first vias.

4. The transmission line of claim 1, further comprising a third ground plane disposed on a side of the first substrate layer away from the second substrate layer, wherein the third ground plane is disposed with an avoiding slot, and the first signal line is disposed in the avoiding slot.

5. The transmission line of claim 1, further comprising a first annular ring disposed in the avoiding groove, the first annular ring being disposed at a periphery of the first through hole and electrically connected to the first through hole and the first signal line.

6. The transmission line of claim 1, further comprising a second annular ring disposed at a level of the second signal line, wherein the second annular ring is disposed at a periphery of the first via and electrically connected to the first via and the second signal line.

7. A method of manufacturing the transmission line according to claims 1-6, comprising

1) Providing the first substrate layer, wherein one side of the first substrate layer is provided with the first signal wire, and the second signal wire is embedded in the first substrate layer;

2) arranging a first through hole penetrating through the first base material layer to electrically connect the first signal line and the second signal line;

3) milling a hole from the other side of the first base material layer corresponding to the first through hole to the direction close to the first signal line to form the isolation groove so as to remove a part of the first through hole;

4) covering a reinforcing plate in the isolation groove, wherein the reinforcing plate comprises a second substrate layer stacked on the first substrate and a first grounding layer arranged on one side, close to the first substrate layer, of the second substrate layer.

8. The transmission line of claim 7, wherein the isolation slot is milled to the level of the second signal line.

9. An electronic device, characterized in that it comprises a transmission line according to any one of the preceding claims 1-6.

[ technical field ] A method for producing a semiconductor device

The present invention relates to the field of signal transmission, and in particular, to a transmission line, an electronic device, and a method for manufacturing the transmission line.

[ background of the invention ]

In the development of radio frequency transmission lines, vias have been an important part. At present, the mode of changing the inner layer wire into the outer layer wire mostly adopts the form of a blind hole, and in addition, a grounding through hole needs to be drilled around the blind hole to prevent electromagnetic leakage. However, in the prior art, when the transition from the inner layer wire to the outer layer wire is realized by using a blind hole form, the size of the blind hole is greatly limited by the processing capacity, and the diameter of the blind hole needs to be larger than the thickness of the lamination, so that the adjustment of the impedance at the through hole is limited.

[ summary of the invention ]

The invention aims to provide a transmission line with a through hole instead of a blind hole.

The transmission line comprises a first substrate layer, a first signal line arranged on one side of the first substrate layer, and a second signal line embedded in the first substrate layer, and further comprises a first through hole penetrating through the first substrate layer to electrically connect the first signal line and the second signal line, wherein the other side of the first substrate layer is recessed towards the direction close to the first signal line corresponding to the position of the first through hole to form an isolation groove so as to remove a part of the first through hole; the transmission line still includes one and covers the stiffening plate of isolation groove, the stiffening plate include with the range upon range of second substrate layer of establishing of first substrate layer and locate the second substrate layer is close to the first ground plane of first substrate layer one side.

Furthermore, the bottom of the isolation groove is connected with the layer where the second signal line is located.

Furthermore, the stiffening plate further comprises a second grounding layer arranged on one side, far away from the first substrate layer, of the second substrate layer and a plurality of second through holes communicated with the first grounding layer and the second grounding layer, and the second through holes are arranged around the first through holes.

Further, the transmission line is still including locating first substrate layer is kept away from the third ground plane of second substrate layer one side, the third ground plane is equipped with dodges the groove, first signal line sets up dodge the inslot.

Further, the transmission line still is provided with first ring hole, first ring hole sets up dodge the inslot, first ring hole is located first through-hole periphery and with first through-hole with first signal line is electric to be connected.

Furthermore, the transmission line is further provided with a second hole ring, the second hole ring is arranged on the layer where the second signal line is located, and the second hole ring is arranged on the periphery of the first through hole and electrically connected with the first through hole and the second signal line.

The invention also provides a method for manufacturing the transmission line, which comprises the steps of

1) Providing the first substrate layer, wherein one side of the first substrate layer is provided with the first signal wire, and the second signal wire is embedded in the first substrate layer;

2) arranging a first through hole penetrating through the first base material layer to electrically connect the first signal line and the second signal line;

3) milling a hole from the other side of the first base material layer corresponding to the first through hole to the direction close to the first signal line to form the isolation groove so as to remove a part of the first through hole;

4) covering a reinforcing plate in the isolation groove, wherein the reinforcing plate comprises a second substrate layer stacked on the first substrate and a first grounding layer arranged on one side, close to the first substrate layer, of the second substrate layer.

Further, the isolation groove is milled to the layer face where the second signal line is located.

The invention also provides an electronic device comprising the transmission line of any one of the above items

The invention has the beneficial effects that: set up the through-hole in the substrate layer, for the blind hole, it is less to receive the restriction of throughput, and same substrate layer sets up the through-hole and can reach littleer diameter, provides more spaces for the impedance adjustment of transmission line, and the course of working is simpler, and the yield is high, has improved the goodness rate of transmission line greatly.

[ description of the drawings ]

FIG. 1 is an exploded perspective view of a transmission line according to an embodiment of the present invention;

FIG. 2 is a perspective assembly view of a transmission line of an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is an enlarged view of B in FIG. 3;

fig. 5 is a flow chart of a method of manufacturing a transmission line according to an embodiment of the invention.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present invention in its various embodiments. However, the technical solution claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.

The embodiment of the invention provides a transmission line and electronic equipment, wherein when an antenna is arranged in the electronic equipment, the antenna and a signal processing unit of the electronic equipment need to be electrically connected through the transmission line. Electronic devices include, but are not limited to, smart phones, tablets, portable wearable devices, and the like.

Referring to fig. 1 to 4, a transmission line includes a first substrate layer 1, a first signal line 10 disposed on one side of the first substrate layer 1, and a second signal line 20 embedded in the first substrate layer 1, the transmission line further includes a first through hole 4 penetrating the first substrate layer 1 to electrically connect the first signal line 10 and the second signal line 20, and an isolation groove 5 is formed in a direction close to the first signal line 10 at a position corresponding to the first through hole 4 on the other side of the first substrate layer 1 to remove a portion of the first through hole 4; the transmission line further comprises a reinforcing plate 6 covering the isolation groove 5, wherein the reinforcing plate 6 comprises a second substrate layer 61 overlapped with the first substrate layer 1 and a first grounding layer 62 arranged on one side of the first substrate layer 1, and the second substrate layer 61 is close to the first substrate layer 1.

In this embodiment, the surface of the first through hole 4 is plated with copper for conducting signals. As can be appreciated, the first signal line 10 forms a microstrip line; the second signal line 20 is disposed in the first substrate layer 1 to form a strip line, the strip line is electrically connected to the first through hole 4, and is indirectly electrically connected to the microstrip line through the copper plating layer of the first through hole 4, so that a transmission line structure that the inner line is converted into the outer line or the outer line is converted into the inner line is realized. Specifically, a hole milling operation may be performed on the first substrate layer 1 to remove the redundant first through holes 4 to obtain the isolation grooves 5. However, the transmission line is easy to break due to the existence of the isolation slot 5, so the reinforcement plate 6 covers the isolation slot 5, and the isolation slot 5 is communicated with the first ground layer 62, so as to prevent the transmission line from breaking from the isolation slot 5 and reduce the signal leakage transmitted to the second signal line. Preferably, the bottom of the isolation trench 5 is connected to the layer where the second signal line 20 is located.

Preferably, the reinforcing plate 6 further includes a second ground layer 63 provided on a side of the second substrate layer 61 away from the first substrate layer 1, and a plurality of second through holes 7 communicating the first ground layer 62 and the second ground layer 63, and the second through holes 7 are provided so as to surround the first through holes 4.

Specifically, the reinforcing plate 6 serves to reinforce the overall strength of the transmission line, while the reinforcing plate 6 is provided with the second via hole 7, the second via hole 7 communicating the second ground layer 63 and the first ground layer 62 to prevent signal leakage of the first via hole 4. In the present embodiment, the reinforcing plate 6 includes 4 second through holes 7, and the four second through holes 7 are disposed around the first through hole 4. It will be appreciated that the four second through holes 7 are provided around the first through hole 4 at opposite positions of the reinforcing plate 6. Specifically, the second through holes 7 are opposite to each other in pairs and are arranged in a cross manner. The relative position of the first through hole 4 on the reinforcing plate 6 is arranged in a surrounding mode through the second through hole 7, and signal leakage is reduced to the maximum extent.

Preferably, the transmission line is further including locating first substrate layer 1 keeps away from the third ground plane 12 of second substrate layer one side, third ground plane 12 is equipped with dodges groove 11, first signal line 10 sets up dodge in the groove 11.

Specifically, the avoiding groove 11 is formed by hollowing out the third ground layer 12, and the avoiding groove 11 is used for avoiding the first through hole 4 from being electrically connected with the third ground layer 12.

Compared with blind hole connection, the limitation of the processing capacity of the first through hole 4 is small, the same environment can reach smaller diameter, more space is provided for impedance adjustment, the processing process is simple, and the yield is high.

Preferably, the transmission line is further provided with a first hole ring 81 and a second hole ring 82; the first hole ring 81 is arranged in the avoiding groove 11, and the first hole ring 81 are annularly arranged on the periphery of the first through hole 4 and are electrically connected with the first through hole 4 and the first signal line 10; the second hole ring 82 is disposed on the layer where the second signal line 20 is located, and the second hole ring 82 is disposed around the periphery of the first through hole 4 and electrically connected to the first through hole 4 and the second signal line 20.

Specifically, the welding area of the first through hole 4 is increased by the hole ring, and the contact area with the first signal line 10 and the second signal line 20 is increased, so that the connection of the first through hole 4 with the first signal line 10 and the second signal line 20 is more stable.

Referring to fig. 5, the present invention further provides a method for manufacturing the transmission line:

step S1: providing the first substrate layer, wherein one side of the first substrate layer is provided with the first signal wire, and the second signal wire is embedded in the first substrate layer;

step S2: arranging a first through hole penetrating through the first base material layer to electrically connect the first signal line and the second signal line;

step S3: milling a hole from the other side of the first base material layer corresponding to the first through hole to the direction close to the first signal line to form the isolation groove so as to remove a part of the first through hole;

step S4: covering a reinforcing plate in the isolation groove, wherein the reinforcing plate comprises a second substrate layer stacked on the first substrate and a first grounding layer arranged on one side, close to the first substrate layer, of the second substrate layer.

Specifically, the isolation groove is milled to the layer where the second signal line is located.

In the above embodiment, the first through holes 4 are adopted to replace blind holes, and the redundant first through holes 4 of the first substrate layer 1 are removed through a hole milling process, so that the isolation grooves 5 are formed, the sizes of the through holes through which signals flow are reduced, and certain benefits are provided for the improvement of the overall performance. The provision of the first ground layer 62 and the second ground layer 63 at the corresponding positions of the first through holes 4 can effectively prevent signal leakage, while the isolation groove 5 can prevent the first through holes 4 from being in electrical contact with the first ground layer 62.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.