Method of manufacturing thick-film circuit component
AssigneeMurata Manufacturing Co., Ltd.
InventorsHiroaki Mori, Masao Yonezawa
Life of this patent
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Abstract
An electrode of a conductive material containing silver and a thick-film resistor of an electric resistive material containing cermet, which is electrically connected to the electrode, are formed on an electric insulating substrate by printing respectively. Then, the thick-film resistor is directly irradiated with a laser beam to be trimmed, and thereafter a protective film of an electric insulating material containing resin is formed on the insulating substrate by printing, to cover the electrode and the thick-film resistor.
Claims15
A method of manufacturing a thick-film circuit component, comprising the steps of:
- preparing an electrically insulating substrate;
- forming on said insulating substrate an electrode made of a conductive material containing silver;
- forming on said insulating substrate a thick-film resistor made of an electrically resistive material containing cermet, said thick-film resistor being electrically connected to said electrode;
- irradiating said thick-film resistor directly with a laser beam to trim said thick-film resistor;
- and
- forming a protective film made of an electrically insulating material containing resin on said insulating substrate after said irradiating step, said protective film being formed so as to cover said electrode and said thick-film resistor.
A method of manufacturing a thick-film circuit component, comprising the steps of:
- preparing an electrically insulating substrate;
- forming on said insulating substrate an electrode made of a conductive material containing silver, by applying paste containing said conductive material onto said insulating substrate by printing, and firing said electrode formed on said substrate;
- forming on said insulating substrate a thick-film resistor made of an electrically resistive material containing cermet, said thick-film resistor being electrically connected to said electrode;
- irradiating said thick-film resistor directly with a laser beam to trim said thick-film resistor;
- forming a protective film made of an electrically insulating material containing resin on said insulating substrate after said irradiating step, said protective film being formed so as to cover said electrode and said thick-film resistor;
- and
- selecting said electrically insulating material such that said electrically insulating material prevents migration of silver from said electrode.
Dependencies are inferred from the claim text.