Grouting printing technology of film switch

Abstract

The invention provides a grouting printing technology of a film switch. The technical process comprises: preparation of a PET film circuit board, drilling of conducting holes, drilling of positioning holes, printing, drying and UV printing. When the conducting holes are drilled, processing is carried out through referring to and comparing with hole positions at a film so as to ensure precision of the drilled holes. The positioning holes are drilled in the PET film circuit board and then positioning is carried out twice by use of sleeve needles on a printer during the printing, such that deviations are not generated in dual-face printing, and the grouting printing quality is ensured.

Description

technical field [0001] The invention relates to the field of membrane switch production, in particular to a hole filling printing process for a double-sided PET film circuit board in a membrane switch. Background technique [0002] The PET film circuit board is an important component material of the membrane switch. Since the PET film circuit board is thin, generally only one-sided printing is used. [0003] At present, when printing on PET circuit boards with complex circuits, the silver jump printing scheme is mainly used on the same layer of the PET film circuit board. The printing action is: print the main silver line → print UV ink on the main silver line → print at the jumper line UV ink → printing silver line at the jumper → printing UV ink on the whole surface. Print two layers of UV ink on the main silver wire and then print jumper silver. If the UV ink is too thin, pinholes will appear and the silver wire will be short-circuited. If the UV ink is too thick, the ov...

AI Technical Summary

Problems solved by technology

Print two layers of UV ink on the main silver wire and then print jumper silver. If the UV ink is too thin, pinholes will appear and the silver wire will be short-circuited. If the UV ink is too thick, the overlapping points of the jumper silver will be broken and open. , if the jumping silver printing is too thin, it will cause micro-disconnection of the line and excessive resistance of the path

The disadvantages of the above printing scheme are low efficiency, low yield rate, unstable electrical performance, etc.