Patent ID: 9168731
Filing Date: 2015-10-27
Classification: B41F,B41P,B81C,H05K

Abstract:
1. A method of screen printing a printed pattern of silver paste material on a low temperature co-fired ceramic (LTCC) tape, comprising the steps of: (i) providing a screen printing machine including a printer table, a screen mesh having pattern openings positioned adjacent the printer table, and a squeegee; (ii) aligning a position of the LTCC tape on the screen table for precisely positioning the LTCC tape relative to the screen mesh having pattern openings; the LTCC tape being positioned such that there is a gap between the screen and tape; (iii) adjusting screen printing parameters for setting a printing condition, the printing parameters being set as a squeegee speed of 50-100 mm/s; a squeegee pressure of 0.05-0.15 MPa, and the gap between the screen and tape (snap-off) of 0.8-1.0 mm; (iv) optimizing screen mesh parameters, the screen mesh being a stainless steel screen mesh, the screen mesh being optimized at a tension of 22-28 N/cm; (v) depositing the silver paste material on the screen mesh; and (vi) directing the squeegee across the screen mesh at the set speed and pressure to push the silver paste material through the pattern openings in the screen mesh to print a pattern of the silver paste material on the LTCC tape.