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. 02, 1992
Filed:
May. 22, 1991
Lowell E Thomas, Tewksbury, MA (US);
Luke R Volpe, Jr, Melrose, MA (US);
Dynamics Research Corporation, Wilmington, MA (US);
Abstract
An edge-type printhead and method of fabricating the same, eliminates the need for precision grinding, lapping, and polishing of a substrate, avoids the need for precision etching of electrode patterns, avoids the use of highly refined etchable thick film pastes, and avoids the need for precision glaze application in the construction thereof. Contact pads are provided on the printhead writing surface. The contact pads facilitate accurately and inexpensively delineated resistor lengths, provide resistor current spreading for full dot width printing and control resistor row straightness. Contact pads permit the use of standard wet or chemical etching with wide spacing between electrodes while facilitating full width printed dots with narrow spacing. The contact pads are applied to the writing edge after the edge-type substrate is laminated, sectioned and the writing surface is polished.