Flexible circuit board drilling method

Abstract

The invention relates to a flexible circuit board drilling method which includes the steps of firstly, parallelly and independently disposing a first drill bit and a second drill bit on a drilling machine; secondly, using the first drill bit to sequentially drill a first group of holes in a circuit board, and using the second drill bit to sequentially drill a second group of holes in the circuit board, wherein the first group of holes and the second group of holes are distributed in the up-down and left-right directions at intervals. The method has the advantages that a cover film is directly used for drilling by improving the drilling procedures, an ink printing procedure is not needed, product yield is increased, manpower and material cost is reduced correspondingly, delivery time is reduced, and probability of drill bit breaking is reduced.

Description

technical field

[0001] The invention relates to a production process of a flexible circuit board, in particular to a drilling method. Background technique

[0002] During the manufacturing process of flexible circuit boards, through holes of different sizes need to be drilled on the surface of the substrate to pave the way for connecting the conductive properties of the two sides of the circuit, or for identification and positioning in subsequent processes. With the development of technology, the diameter of the drilled hole has been reduced to 1.0mm, and the hole-to-hole spacing has been reduced to 1.03mm. The mechanical force and heat generated during drilling have put forward higher requirements for the drilling process. When the hole distance and hole diameter are small, the mechanical force on the edge of the hole will increase, the drill speed will increase, and the drilling speed will increase, resulting in a large amount of heat generated by friction, and the tempera...

Images