Using method of polyimide (PI) ink

Abstract

The invention provides a using method of polyimide (PI) ink. The using method comprises the following steps of: mixing the PI ink, printing, pre-baking, aligning and developing. By the method, the problems in the general crystal violet lactone (CVL) production; a new production method is supplied by rationally using the PI ink, so that the precision and the quality of a finished product are effectively improved; various technologies of the finished product are obviously improved; moreover, the production time is saved by fining the production flow, so that labor and material resources are greatly saved; the total production cost is reduced; the production efficiency is promoted and improved; and active and deep benefits in actual production are realized.

Description

technical field [0001] The invention relates to the technical field of FPC, in particular to a method for using PI ink. Background technique [0002] With more and more functional requirements and stronger performance requirements of electronic products, electronic devices are bound to become "light, thin, short, small" and multi-functional. Corresponding to the development of electronic equipment, the wiring density of the corresponding FPC (printed board) becomes higher, and the alignment offset becomes smaller. In addition, the size of the PAD (pad) is getting smaller and smaller, and the overall production difficulty is getting more and more difficult. Therefore, the design and production requirements for FPC circuit graphics have also increased, especially due to the narrowing of the alignment offset (now 0.05mm), resulting in higher and higher precision between PAD and PAD. [0003] For the increasing line density and the high precision of offset and PAD, the current ...