Patent ID: 6180292
Filing Date: 2001-01-30
Classification: G03F,Y10S

Abstract:
A pellicle member for positioning a membrane member at a gap distance from an X-ray mask containing an absorber pattern area and for protection from contamination of said X-ray mask, comprising in combination:an assembly of a circular membrane member on a washer shaped spacer member, said spacer member having,first and second essentially parallel surfaces,a central opening through said spacer member having a diameter sufficient to accommodate said absorber pattern,a first thickness dimension between said first and second essentially parallel surfaces at the periphery of said washer shaped spacer member that is of the order of said gap distance, and,a second thickness dimension between said first and second essentially parallel surfaces at the edge of said central opening that is of the order of about 3 micrometers,said membrane member having a thickness dimension of the order of about 1 micrometer and being in intimate contact with and attached to the entire area of said second essentially parallel surface of said spacer member.