Processing method of high-precision printed connector PCB

Abstract

The invention discloses a processing method of a high-precision printed connector PCB, wherein the processing method comprises performing a drill slot forming step on key areas at two sides of the printed connector, wherein a 1.0 mm stiffened slotting cutter in the drill slot forming step, the holes are intersected, and one hole is drilled every 0.15mm for forming a smooth profile area. A photosensitive dry film for pattern transfer is a Hitachi H-640 thick metal dry film with relatively high hole sealing performance and relatively high electroplating resistance, and in production, a pressure is applied on the product line for keeping a washing pressure to 1kg / cm<2>. The processing method of the high-precision printed connector PCB has advantages of high processing precision, high product reliability, high process capability and low cost.

Description

technical field [0001] The invention relates to the technical field of printed circuit board processing, in particular to a processing method for a high-precision printed plug PCB. Background technique [0002] For printed plug products (also known as gold finger products), the tolerance from part of the graphics to the edge of the shape is required to be ±0.1mm. One end of this type of product is designed for gold finger plugs, using hard gold plating technology, and the PCB needs to be resistant to multiple insertions. , the representative product with a large demand in the industry is optical module PCB design, which is described below as a representative of such products. [0003] The optical module is composed of optoelectronic devices, functional circuits, and optical interfaces. The optoelectronic devices include two parts: transmitting and receiving. They are used as carriers for transmission between switches and devices. Compared with transceivers, they are more eff...

AI Technical Summary

Problems solved by technology

[0005] In order to meet the signal transmission requirements, the size of the golden finger plug on the printed circuit board of the optical module is generally controlled at 9.2±0.1mm, and the dimensional tolerance from the graphics to the shape needs to be controlled at the standard of ±0.1mm. The actual PCB processing is subject to drilling, graphics transfer, and shape equipment. Influenced by precision, the general dimensional tolerance can only reach the standard of ±0.15mm. After repeated plugging and unplugging, the socket will wear and become larger. If the PCB printed plug and socket are not well matched, the offset will be too large, which will cause the gold finger to contact the plug. Offsets are formed between the contact pieces inside, causing a short circuit and causing the communication equipment to burn out