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:
Jul. 30, 1991
Filed:
May. 25, 1990
Applicant:
Inventors:
Johann Kammermaier, Unterhaching, DE;
Gerhard Rittmayer, Erlangen, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427 41 ; 427 451 ;
Abstract
Layers consisting of vinylidene fluoride polymers or vinylidene fluoride/trifluoroethylene copolymers can be prepared with a thickness of <10 .mu.m, whereby the dielectric constant or the ferroelectric properties simultaneously correspond to those of known materials. Vinylidene fluoride or a mixture of vinylidene fluoride and trifluoroethylene in a concentration of .ltoreq.5.times.10.sup.-9 mol/cm.sup.3 is subjected to a low pressure plasma polymerization which is excited by microwaves, and the polymer or copolymer is deposited onto a substrate at an electric field strength of <850 V/cm.