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:
Feb. 11, 1997
Filed:
May. 17, 1995
Applicant:
Inventors:
Albert Hammerschmidt, Erlangen, DE;
Siegfried Birkle, Hoechstadt, DE;
Assignee:
Siemens Aktiengesellschaft, Munchen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428209 ; 428901 ; 361748 ;
Abstract
Multilayer printed circuit boards and multichip-module substrates having at least one layered composite of high-temperature-stable plastic and conductive tracks wherein the plastic is provided with a thin layer of amorphous, hydrogenated carbon (a--C:H) having a water permeation coefficient of <1.1.times.10.sup.-13 m.sup.2 /s. The a--C:H-layer also has a hardness gradient across it.