SCREEN PRINTING STENCIL AND METHOD FOR MANUFACTURING THE SAME
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United States of America Patent
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Issued Date -
Dec 11, 2008
app pub date -
Nov 1, 2007
filing date -
Jun 8, 2007
priority date (Note) -
Abandoned
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Abstract
An exemplary screen printing stencil includes a frame, a screen mesh and a metal foil. The screen mesh is stretched tightly in the frame. The metal foil is attached on a surface of the screen mesh. A screen printing pattern is defined on the metal foil by a laser machining process. A machining tolerance of the screen printing pattern is either in a range from 0.005 to 0.02 millimeters or in a range from -0.02 to -0.005 millimeters. The screen printing stencil can be used in a screen printing process of manufacturing a printed circuit board, thereby improving quality of the printed circuit board.
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