Patent · US Expired

Enamellings with heterogeneous structure

US4734316A · kind A · utility

3Cited by

0References

10Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Bruno Hees · Langenfeld, DE
Hans-Peter Hoffmann · Dachau, DE
Matjaz Florjancic · Murr, DE
Horst Richter · Kufstein, AT
Karin Ruess · Stuttgart, DE
Stauros Smernos · Stuttgart, DE
Otto Thaidigsmann · Stuttgart, DE

Key dates

Filing date	Jul 15, 1986
Grant date	Mar 29, 1988
Priority date	—
Expiry date	Jul 15, 2006

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24926
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An article of manufacture useful as the base for an electronic circuit board is a substrate with an enamel layer having a heterogeneous structure containing at least two different phases obtained by applying a homogeneous, alkali-containing enamel powder to the substrate followed by heating at 850.degree. C. to 1,000.degree. C. wherein the enamel power has the composition as follows: ______________________________________ Si.sub.O2 40-50% by weight Al.sub.2 O.sub.3 8-15% by weight Na.sub.2 O + K.sub.2 O 4-16% by weight CaO + BaO 25-35% by weight MgO 0-3% by weight B.sub.2 O.sub.3 0-10% by weight. ______________________________________

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