Patent · US Expired

Film as a dielectric in capacitors and process for its production

US7079372B2 · kind B2 · utility

6Cited by

13References

5Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Hans-Leo Weber · Eschenried, DE
Klaus Meyer · Kaarst, DE
Peter Bier · Krefeld, DE

Key dates

Filing date	Jan 15, 2003
Grant date	Jul 18, 2006
Priority date	—
Expiry date	Jan 15, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH01G4/015
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A dielectric capacitor having self healing properties is disclosed. The capacitor includes a film made of an amorphous aromatic copolycarbonate having a weight average molecular weight of at least 10,000 and a glass transition temperature of at least 160° C. In a preferred embodiment the copolycarbonate includes structural units derived from bisphenol TMC. Also disclosed is a process for making the film.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.