A non-sinking copper hole with an annular ring and a method for manufacturing a printed circuit board
A printed circuit board, non-submerged copper hole technology, applied in the direction of printed circuit manufacturing, printed circuits, and the formation of electrical connection of printed components, can solve the problems of easy to produce sharp edges, difficult to handle, damage to the hole ring, etc.
Active Publication Date: 2018-07-24
NEW FOUNDER HLDG DEV LLC +1
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Problems solved by technology
[0011] (1) After etching for the second drilling, there is an etched circuit pattern on the printed board surface, and it is easy to scratch the pattern line during the second drilling operation, resulting in an open circuit;
[0012] (2) It is easy to cause lashing and difficult to deal with;
[0013] (3) Material and other conditions are limited, such as RO4350B and other materials, the hole ring is prone to damage during the second drilling;
[0014] With the rapid development of the electronics industry, the use of two-drill technology to make NPTH holes with hole rings can no longer meet the requirements of the development of the electronics industry. There must be a new technology to make up for the shortcomings of the two-drill manufacturing process and optimize its production. The process and solution to the problem of the edge and the damage of the hole ring caused by the second drilling of the NPTH hole with the hole ring
Method used
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Embodiment Construction
[0030] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0031] Such as figure 2 As shown, the NPTH hole manufacturing method of the ring with holes in the present embodiment comprises the following steps:
[0032] (1) Drilling.
[0033] Make through holes on the laminated printed circuit board, such as image 3 (a) Left through hole. Of course, through holes other than non-sinking copper holes with annular rings can also be made at the same time, such as image 3 (b) Right side through hole. That is to integrate the drilling process of NPTH holes with grommets into the normal drilling process, and optimize the existing drilling process of NPTH holes with grommets (secondary drilling). The effect of the circuit board after lamination is as follows: image 3 As shown in (a), the effect after drilling is as follows image 3 (b) shown.
[0034] (2) Electroplating.
[0035] Copper plating on t...
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The invention belongs to the technical field of manufacturing of printed circuit boards and relates to a method for making a non-plating through hole with a hole ring and a printed circuit board manufacturing method. The method for making the non-plating through hole with the hole ring includes: firstly, drilling to make through holes in laminated printed circuit boards; secondly, carrying out electroplating to copperize faces of the laminated printed circuit boards and interiors of the through holes; thirdly, performing pattern transferring again to make patterns on the faces of the laminated printed circuit boards, and windowing the hole with the hole ring; finally, etching the patterns and the windowed hole to form the non-plating through hole. When the non-plating through hole with the hole ring is made, a secondary drilling procedure is omitted, so that a whole process is optimized; in addition, due to avoidance of the secondary drilling procedure, the problems of flashing and hole ring damages resulted from the secondary drilling procedure are thoroughly solved.
Description
technical field [0001] The invention belongs to the technical field of printed circuit board (PCB) manufacturing, and in particular relates to a non-sinking copper hole with an annular ring and a method for manufacturing the printed circuit board. Background technique [0002] In the field of printed circuit board (PCB) manufacturing, with the improvement of product performance, it has evolved from NPTH (Non Plating Through Hole) printed circuit boards without hole rings to NPTH printed circuits with hole rings. plate. As for the manufacturing process of non-sinking copper holes with annular rings, the two-drilling process is generally used in the entire printed circuit board industry at present. The production process is as follows: [0003] Pressing - drilling (first drilling) - electroplating - pattern transfer - etching (acid) - drilling (second drilling) - AOI (optical inspection). [0004] The role of each process in the above process is as follows: [0005] (1) Dri...
Claims
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IPC IPC(8): H05K3/42
CPCH05K3/42H05K3/423
Inventor 罗杨
Owner NEW FOUNDER HLDG DEV LLC