Enhancements in framed sheet processing
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United States of America Patent
Stats
-
Dec 26, 2006
Grant Date -
Jun 6, 2002
app pub date -
Dec 26, 2001
filing date -
Oct 17, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A flexible sheet used in manufacture of microelectronic components is held on a frame formed from a rigid material so that the frame maintains the sheet under tension during processing and thereby stabilizes the dimensions of the sheet. The frame may be formed from a rigid, light-transmissive material such as a glass, and the bond between the frame and sheet may be made or released by light transmitted through the frame. Preferred features of the framed sheet minimize entrapment of processing liquids such as etch solutions, thereby minimizing carryover of processing solutions between steps. The frame may have contact openings which permit engagement of a metallic layer on the sheet by an electrode carrying electroplating or etching current without disturbing the main portion of the sheet where features are to be formed or treated.
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