Patent · US Expired

Method for making holes in ceramic green sheets

US6706236B2 · kind B2 · utility

4Cited by

7References

10Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Juergen Zaremba · Rottenburg am Neckar, DE
Walter Zein · Metzingen, DE
Wolfgang Jacob · Horb, DE
Ralf Schmid · Karlsruhe, DE

Key dates

Filing date	Nov 30, 2000
Grant date	Mar 16, 2004
Priority date	—
Expiry date	Feb 19, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T156/1304
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

To make holes in ceramic green sheets that are needed to create feedthroughs, it is proposed to make the holes by using a gas that is under a higher pressure than atmospheric pressure and that is expelled in a pulsed manner from a pressure vessel and thereby acts on a principal surface of a ceramic green sheet, at at least one location at which a hole is to be made, in such a way that material is shot out of the ceramic green sheet at that location. This eliminates the disadvantages associated with the use of punches to punch holes.

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