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:
Sep. 19, 1989
Filed:
Sep. 28, 1988
Applicant:
Inventors:
Assignee:
Hitachi Chemical Co., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B44C / ; C23F / ; C03C / ; C03C / ;
U.S. Cl.
CPC ...
156651 ; 29846 ; 156654 ; 156656 ; 1566591 ; 156663 ; 156667 ; 156901 ; 252 792 ; 252 793 ; 252 795 ; 427 96 ; 427 98 ; 430313 ; 430318 ;
Abstract
A surface of ceramic plate is roughened uniformly by immersing in a mixed solution comprising NH.sub.4 F, (NH.sub.4).sub.2 SO.sub.4, H.sub.2 SO.sub.4 and H.sub.2 O, followed by immersion in molten NaOH, and the resulting surface roughened ceramic plate can be used for producing a ceramic wiring board.