Manufacturing method of circuit board, circuit board, and...

Details Manufacturing method of circuit board, circuit board, and... Manufacturing method of circuit board, circuit board, and...

2005-01-04

2005-01-04

Tsai, H. Jey (Department: 2812)

Semiconductor device manufacturing: process

Making passive device

Resistor

C438S745000, C361S766000

Reexamination Certificate

active

06838351

ABSTRACT:
A circuit board for a liquid discharging apparatus in which coating performance of a protective layer and a cavitation resistive film on a heat generating element is excellent and durability is excellent and a manufacturing method of such a circuit board are provided. A surface portion of a wiring material layer is processed so that an etching speed of the surface portion is made higher than that of the material forming the wiring material layer. It is desirable to execute a process for forming at least one selected from a fluoride, a chloride, and a nitride of the material forming the wiring material layer into the surface portion of the wiring material layer.

REFERENCES:
patent: 5376231 (1994-12-01), Matsumoto et al.
patent: 6784530 (2004-08-01), Sugaya et al.
patent: 4-320849 (1992-11-01), None
patent: 4-320850 (1992-11-01), None

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