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:
Jan. 02, 1996
Filed:
Mar. 20, 1995
Richard D Murphy, Houston, TX (US);
Compaq Computer Corporation, Houston, TX (US);
Abstract
Disclosed is a method of manufacturing an ink jet printhead comprising the steps of: (1) coating a substantially flat lower surface of an upper piezoelectric member with a first conductive coating, (2) coating a substantially flat upper surface of a lower piezoelectric member with a second conductive coating, (3) depositing a conductive metal over the first conductive coating, (4) forming a first elongated indentation in the lower surface, the first indentation extending through the first coating and into the upper member, (5) joining the metal with the second conductive coating by placing the upper piezoelectric member over the lower piezoelectric member, (6) inducing a current in the metal with an electromagnetic field having a specified frequency to thereby melt the metal and (7) cooling the metal, the metal electrically and mechanically joining the first coating to the second coating, the first indentation and the upper surface thereby forming the channel, the channel capable of containing ink and capable of ejecting ink therefrom when an electric current distorts the upper and lower piezoelectric members. The specified frequency allows the electromagnetic field to melt the metal completely without unduly heating the piezoelectric members.