Patent · US Expired

Ion filter and method of making the same

US4158771A · kind A · utility

8Cited by

3References

9Claims

0Family size

Assignee

Leybold-Heraeus GmbH & Co. KG · DE

Inventors

Udo Beeck · Lechenich, DE
Andreas Kluge · Cologne, DE

Key dates

Filing date	Jun 7, 1977
Grant date	Jun 19, 1979
Priority date	—
Expiry date	Jun 7, 1997

Classification

Technology area (CPC H)Electricity
CPC primaryH01J49/4255
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method of making an ion filter having an electrically insulating body formed of at least two longitudinal parts and having metallized inner faces of generally hyperbolic cross-sectional shape, comprises the following steps: (a) making longitudinal body segments constituting the longitudinal parts; (b) grinding the longitudinal body segments to the predetermined cross-sectional shape; (c) metallizing those ground surface portions of each longitudinal body segment that are to serve in the ion filter as inner electrode faces for generating electric fields of predetermined configuration; and (d) securing, subsequent to the metallizing step, the longitudinal body segments to one another.

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