Patent ID: 11963307
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. A method comprising:
predicting a solder ball ball-grid-array defect that could occur during reflow of a ball- grid-array assembly;
assigning an initial via suction pattern to mitigate the solder ball ball-grid-array defect;
applying a vacuum head to a via in the ball-grid-array assembly, wherein a solder ball is located at the opposite end of the via; and
applying a first amount of suction to the via and a second amount of suction to a second via in the ball-grid-array assembly based on the initial via suction pattern, wherein the first amount of suction draws a portion of the solder ball into the via during reflow and wherein the first amount of suction does not equal the second amount of suction.