Optical communication board with segmented golden finger process

Abstract

The utility model belongs to the technical field of PCBs (printed circuit boards), and discloses an optical communication board with a segmented golden finger process. The optical communication board comprises P golden finger arrangement unit structures, each golden finger arrangement unit structure is spaced by N-1 columns of golden fingers through N photosensitive oil exposure data areas; m first photosensitive oil strips transversely penetrate through the (N-1) columns of golden fingers; the N photosensitive oil exposure data areas are exposed through photosensitive oil in the longitudinal direction, 3M second photosensitive oil strips are developed through the photosensitive oil, and the second photosensitive oil strips are communicated with the first photosensitive oil strips. And the 3M second photosensitive oil strips are subjected to golden finger electrical connection, selective dry film exposure, selective dry film development and alkaline etching, and then the optical communication board containing the segmented golden finger process is prepared. According to the utility model, the adhesive force of the photosensitive oil is enhanced, and the reject ratio that the photosensitive oil is easy to fall off is reduced to 0%.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of PCB board, especially relates to a light communication board containing segmented golden finger process. BACKGROUND

[0002] The prior art usually designs a long strip of photosensitive oil data at the segmented golden finger position. The photosensitive oil is easy to fall off, resulting in electrical gold at the segmented golden finger position, and alkaline etching cannot etch the segmented position, with a 50% defective rate. SUMMARY

[0003] To overcome the problems in the prior art, the utility model discloses a light communication board containing segmented golden finger process, which can be applied to a PCB board containing segmented golden fingers.

[0004] The technical solution is as follows: a light communication board containing segmented golden finger process, comprising: P golden finger arrangement unit structures; each golden finger arrangement unit structure is separated from N-1 columns of golden fingers by N photosensitive oil exposure data intervals; M first photosensitive oil strips are transversely passed through the N-1 columns of golden fingers; and 3M second photosensitive oil strips are formed on the N photosensitive oil exposure data intervals by photosensitive oil exposure and photosensitive oil development, and the second photosensitive oil strips are communicated with the first photosensitive oil strips.

[0005] After the 3M second photosensitive oil strips are exposed to electrical golden fingers, selected dry film, selected dry film development and alkaline etching, the light communication board containing segmented golden finger process is prepared.

[0006] The length and width of the second photosensitive oil strip are 8mil*4mil rectangular photosensitive oil strips.

[0007] The second photosensitive oil strip is a geometric shape other than a rectangle.

[0008] The geometric shape other than a rectangle is set according to actual needs.

[0009] Further, the light communication board containing segmented golden finger process comprises:

[0010] Two golden finger arrangement unit structures;

[0011] Each golden finger arrangement unit structure is separated from two columns of golden fingers by three photosensitive oil exposure data intervals;

[0012] Three first photosensitive oil strips are transversely passed through the two columns of golden fingers;

[0013] Nine second photosensitive oil strips are formed on the three photosensitive oil exposure data intervals by photosensitive oil exposure and photosensitive oil development; every three second photosensitive oil strips form a group, and the second photosensitive oil strips are communicated with the first photosensitive oil strips.

[0014] The nine second photo-sensitive oil strips are made into the optical communication board with segmented gold finger process after electro-gold finger, selected dry film exposure, selected dry film development and alkaline etching.

[0015] The nine second photo-sensitive oil strips are rectangular photo-sensitive oil strips with a length of 8 mil and a width of 4 mil.

[0016] The nine second photo-sensitive oil strips are one of a circle and an ellipse, and the size is set according to actual needs.

[0017] Further, the optical communication board with segmented gold finger process is mounted on a communication PCB board of an electronic device.

[0018] With all the above technical solutions, the beneficial effects of the present application are that the present application enhances the adhesion of photo-sensitive oil and reduces the bad rate of easy falling of photo-sensitive oil to 0%. A rectangular photo-sensitive oil pattern is added between the gold fingers, and a H-shaped pattern is formed after the photo-sensitive oil is developed, which can effectively enhance the adhesion of photo-sensitive oil between the gold fingers. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and serve to explain the principles of the present disclosure, together with the description;

[0020] Figure 1 is a schematic view of an optical communication board of prior art photo-sensitive oil exposure data provided by the present application;

[0021] Figure 2 is a schematic view of an optical communication board with segmented gold finger process provided by the present application;

[0022] In the figure: 1, gold finger arrangement unit structure; 2, photo-sensitive oil exposure data area; 3, gold finger; 4, first photo-sensitive oil strip; 5, second photo-sensitive oil strip. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific implementation disclosed below.

[0024] Embodiment 1, the schematic view of prior art photo-sensitive oil exposure data is as Figure 1 The technical defect is that the adhesion of photo-sensitive oil is poor, and the bad rate may exceed 50%.

[0025] Comprise: multiple sets of gold finger arrangement unit structure 1;

[0026] Gold finger arrangement unit structure 1 is spaced by photosensitive oil exposure data area 2 gold finger 3;

[0027] On two columns of gold fingers 3, there are first photosensitive oil strips 4 transversely penetrating.

[0028] As Figure 2 Indicated, the utility model provides a light communication board containing segmented gold finger process includes:

[0029] P gold finger arrangement unit structure 1;

[0030] Each gold finger arrangement unit structure 1 is spaced by N photosensitive oil exposure data area 2 N-1 column gold finger 3;

[0031] On N-1 column gold finger 3, there are M first photosensitive oil strips 4 transversely penetrating;

[0032] On N photosensitive oil exposure data area 2, there are 3M second photosensitive oil strips 5 by photosensitive oil exposure, photosensitive oil development longitudinally;Second photosensitive oil strip 5 is communicated with first photosensitive oil strip 4.

[0033] After 3M second photosensitive oil strips 5 are exposed by electric gold finger, selected dry film, selected dry film development and alkaline etching, the light communication board containing segmented gold finger process is made.

[0034] Second photosensitive oil strip 5 is rectangular photosensitive oil strip with length and width W2:8mil x W1:4mil;

[0035] Exemplarily, second photosensitive oil strip 5 can also be other geometric shapes, and size is set according to actual needs.

[0036] Embodiment 2, two gold finger arrangement unit structures 1 are taken as an example, each gold finger arrangement unit structure 1 is spaced by three photosensitive oil exposure data areas 2 two columns of gold fingers 3, as Figure 2 Indicated, the utility model provides a light communication board containing segmented gold finger process includes:

[0037] Two gold finger arrangement unit structures 1;

[0038] Each gold finger arrangement unit structure 1 is spaced by three photosensitive oil exposure data areas 2 two columns of gold fingers 3;

[0039] On two columns of gold fingers 3, there are three first photosensitive oil strips 4 transversely penetrating;

[0040] Nine second photoresist strips 5 are exposed and developed by photoresist exposure on the three photoresist exposure data areas 2; each three second photoresist strips 5 form a group, and the second photoresist strips 5 are communicated with the first photoresist strips 4.

[0041] After the nine second photoresist strips 5 are exposed and developed by electroplating gold finger, dry film exposure, dry film development and alkaline etching, the optical communication board with segmented gold finger process is prepared.

[0042] The nine second photoresist strips 5 are rectangular photoresist strips with a length of W2: 8 mil and a width of W1: 4 mil.

[0043] Exemplarily, the nine second photoresist strips 5 can also be one of but not limited to a circle and an ellipse, and the size is set according to actual needs.

[0044] Working principle: the optical communication board with segmented gold finger process (new photoresist exposure data) of the utility model, as shown in the figure, a rectangle with a length of W2: 8 mil and a width of W1: 4 mil is added between the gold fingers 3 and the photoresist exposure data area 2, which can effectively enhance the adhesion of the photoresist. Figure 2

[0045] The manufacturing process of the optical communication board with segmented gold finger process of the utility model comprises:

[0046] Pressing, drilling, laser drilling, mechanical drilling, plasma, horizontal copper sinking, hole filling plating, negative film pattern, negative film etching, outer layer AOI, photoresist exposure, photoresist development, electroplating gold finger, dry film exposure, dry film development and alkaline etching.

[0047] Through the improvement of photoresist exposure and development after the outer layer AOI and the improvement of alkaline etching after the dry film development, the optical communication board with segmented gold finger process prepared can reduce the bad rate of easy photoresist falling from 50% to 0%.

[0048] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in a certain embodiment can be referred to the related description of other embodiments.

[0049] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make any modification, equivalent replacement and improvement within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.​

Claims

1. An optical communication board with a segmented gold finger process, comprising: P gold finger arrangement unit structure (1); each gold finger arrangement unit structure (1) is separated by N-1 columns of gold fingers (3) through N photosensitive oil exposure data areas (2); M first photosensitive oil strips (4) are transversely penetrating the N-1 columns of gold fingers (3); characterized in that 3M second photosensitive oil strips (5) are formed longitudinally through photosensitive oil exposure and photosensitive oil development in the N photosensitive oil exposure data areas (2); the second photosensitive oil strips (5) are connected to the first photosensitive oil strips (4).

2. The optical communication board with segmented gold finger process according to claim 1, characterized in that, The second photosensitive strip (5) is made by electro-gold finger, selective dry film exposure, selective dry film development and alkaline etching.

3. The optical communication board with segmented gold finger process according to claim 1, characterized in that, The second photosensitive strip (5) is a rectangular photosensitive strip with a length and width of 8mil × 4mil.

4. The optical communication board with segmented gold finger process according to claim 1, characterized in that, Each gold finger arrangement unit structure (1) is separated by two rows of gold fingers (3) through three photosensitive oil exposure data areas (2); Three first photosensitive oil strips (4) run horizontally through the two columns of gold fingers (3); Nine second photosensitive oil strips (5) are formed on the three photosensitive oil exposure data areas (2) through photosensitive oil exposure and photosensitive oil development; every three second photosensitive oil strips (5) form a group, and the second photosensitive oil strips (5) are connected to the first photosensitive oil strips (4).

5. The optical communication board with segmented gold finger process according to claim 4, characterized in that, The second photosensitive strip (5) is made by electro-gold finger, selective dry film exposure, selective dry film development and alkaline etching.

6. The optical communication board with segmented gold finger process according to claim 5, characterized in that, The second photosensitive strip (5) is a rectangular photosensitive strip with a length and width of 8mil × 4mil.

7. The optical communication board with segmented gold finger process according to claim 6, characterized in that, The second photosensitive strip (5) is either circular or elliptical.

8. The optical communication board with segmented gold finger process according to any one of claims 1-7, characterized in that, This optical communication board, which incorporates a segmented gold finger process, is mounted on the communication PCB board of electronic devices.

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