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:
Aug. 10, 1993
Filed:
Aug. 27, 1990
Seiko Instruments Inc., , JP;
Abstract
A method of simultaneously producing a plurality of thermal heads having a ridge-shaped glaze structure uses first and second glass pastes, the second glass paste having a higher softening temperature than the first glass paste. The first glass paste is printed on a substrate in a pattern having a plurality of adjacent slit-shaped openings in parallel. Next, the second glass paste is printed in a pattern having independent bands which cover the openings. The first and second glass pastes are melted and hardened simultaneously by heat treatment so as to form the ridge-shaped glaze structure. A plurality of isolated individual resistors are formed linearly along the crest of the ridge-shaped glaze structure, and a plurality of isolated individual traces are formed which connect at one end to each of the resistors. Lastly, the substrate is divided along separation lines into a plurality of thermal heads having a ridge-shaped glaze structure.