Glass Lapping Process

Single Side Lapping Glass

Single Side Lapping

Though we run primarily double-side lappers, Coresix has developed a proprietary process of single-side lapping on double-side machines enabling far better thickness control, parallelism and flatness on thin substrate. Where our double-side lapping process is limited to 450um, we can single-side lap as low as 100um in thickness.

Double Side Lapping Glass

Double Side Lapping

Our primary means of surface grinding, double-side lapping produces far superior thickness, flatness and parallelism results than the typical single-side process. Coresix has a long history and extensive experience in machine conditioning and process design to achieve what others cannot. Our 20" platforms can accommodate parts as large as 450mm and as thin as 450um.

Thinning Glass

Glass Thinning

For wafer applications requiring characteristics not available in the raw glass form including thickness, thickness tolerance, thickness variation, flatness and parallelism, these critical specifications are established early in the fabrication process through double-side lapping. We run multiple platforms and variations of the lapping process to consistently meet the most stringent of these requirements from small volume R&D to high volume production.


Common Terms for Lapping

Lapping Capabilities

Lapping Minimum Maximum Tolerance
Flatness 1/10 Wave NA NA
Bow/Warp <1um/Inch NA NA
TTV NA +/-1um  
Thickness 200um NA +/-5um
Size 10mm 300mm +/-0.10mm