The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 15, 2019
Filed:
Jul. 22, 2015
Koa Corporation, Ina-shi, Nagano, JP;
Naoto Oka, Ina, JP;
Homare Sasaki, Ina, JP;
KOA Corporation, Ina-shi, JP;
Abstract
The invention is to provide a resistor trimming method capable of adjusting a resistance value with ultrahigh precision and having excellent production efficiency. To achieve the object, a start point (S) at a distance from a resistor () is irradiated with laser light while probes are brought into contact with a pair of surface electrodes () to measure a resistance value of the resistor (). The place irradiated with the laser light is scanned so that a first trimming groove () extending in a direction perpendicular to a current direction can be formed in the resistor (). Then, the place irradiated with the laser light is returned by a predetermined amount from an end point (first turning point (T)) of the first trimming groove () to be set as a second turning point (T). With the second turning point (T) as a start point, scanning and cutting is performed to forma second trimming groove (). Thus, the resistance value of the resistor () is adjusted to a target resistance value with high precision.