Nanotimes

Pressurex^® pressure-indicating sensor film provides a convenient, accurate, repeatable, and low cost control for both bonding and coplanarity. The thin flexible sensor film reveals pressures from 2 to 43,200 PSI (0.14 to 3,000 kg/cm²). When placed between the contacting surfaces of a flip chip bonder, it instantaneously and permanently changes color directly proportional to the amount of pressure applied.

Pressurex^® Reveals a Pressure Profile Across the Surface of a Flip Chip Bonder

The precise pressure magnitude and distribution is then easily determined by comparing color variation results to a coor correlation chart (conceptually similar to interpreting Litmus paper).