Helene Prigge

Follow

Person

Unterschleissheim, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Process for removing gaseous contaminating compounds from carrier g...
- Patent number 5,051,117
- Issue date Sep 24, 1991
- Wacker-Chemitronic Gesellschaft fur Elektronik-Grundstoffe mbH
- Helene Prigge
- C30 - CRYSTAL GROWTH
Information Patent Grant
Process for preserving the surface of silicon wafers
- Patent number 4,973,563
- Issue date Nov 27, 1990
- Wacker Chemitronic Gesellschaft
- Helene Prigge
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Process and apparatus for etching semiconductor surfaces
- Patent number 4,971,654
- Issue date Nov 20, 1990
- Wacker-Chemitronic Gesellschaft fur Electronik-Grundstoffe mbH
- Anton Schnegg
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of haze-free polishing for semiconductor wafers
- Patent number 4,968,381
- Issue date Nov 6, 1990
- Wacker-Chemitronic Gesellschaft fur Elektronik-Grundstoffe mbH
- Helene Prigge
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Process for removing n-type impurities from liquid or gaseous subst...
- Patent number 4,892,568
- Issue date Jan 9, 1990
- Wacker-Chemitronic Gesellschaft fur Elektronik-Grundstoffe mbH
- Helene Prigge
- C01 - INORGANIC CHEMISTRY