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:
Jun. 25, 2002
Filed:
Aug. 02, 2001
Kengo Sugaya, Ibaraki-ken, JP;
Terutoshi Nakao, Ibaraki-ken, JP;
Riso Kagaku Corporation, Tokyo, JP;
Abstract
A protective layer of a thermal head is treated with a surface-treating agent containing a chlorosilyl group-containing compound and a fluoroalkyl group-containing silane compound to form a water-repellent oil-repellent dry film thereon. Both compounds are dissolved or suspended into an organic solvent such is an alcohol solvent. The solvent can contain 0 to 10 wt % of water based on the total weight of the solvent. The surface-treating agent may have a pH of 0 to 3, and both compounds are contained in an amount of 0.01 to 10 wt % in total based on the total amount of the treating agent. The treatment lowers the surface tension of the protective layer and thus prevents deposition of melt on the thermal head for a long period of time while maintaining thermal conduction and surface smoothness of the thermal head.