Patent · US Expired

Device for the input of a nominal value for the impact point of an electron beam on a medium

US4791301A · kind A · utility

4Cited by

4References

15Claims

0Family size

Assignee

Leybold GmBH · DE

Inventors

Volker Bauer · Neuberg, DE
Josef Heimerl · Gelnhausen, DE
Horst Ranke · Alzenau, DE

Key dates

Filing date	Oct 28, 1986
Grant date	Dec 13, 1988
Priority date	—
Expiry date	Oct 28, 2006

Classification

Technology area (CPC H)Electricity
CPC primaryH01J37/305
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The nominal position value for the impact point of an electron beam on a medium located in a crucible is input to a device having a screen on which the contours of the crucible are represented. Light pen means establish a plurality of nominal positions of impact of the electron beam within the represented contours of the crucible.

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