David J. Twiss

Follow

Person

Topsfield, MA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Directional gas injection for an ion source cathode assembly
- Patent number 8,263,944
- Issue date Sep 11, 2012
- Varian Semiconductor Equipment Associates, Inc.
- John Bon-Woong Koo
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
DIRECTIONAL GAS INJECTION FOR AN ION SOURCE CATHODE ASSEMBLY
- Publication number 20100155619
- Publication date Jun 24, 2010
- Varian Semiconductor Equipment Associates Inc.
- John Bon-Woong Koo
- H01 - BASIC ELECTRIC ELEMENTS