26/08/2026
Reliable BGA placement starts with verified spacer positioning. Large server BGAs are commonly assembled with non-collapsing spacers positioned underneath the package. During reflow, these spacers maintain a defined stand-off height, preventing warped corners from compressing the solder paste and creating solder bridges or short circuits.
For this reason, the presence and placement accuracy of every spacer must be verified before mounting high-value BGAs.
placement machines perform this verification directly in the placement machine using the integrated PCB camera. Spacer presence and position are inspected immediately after placement, and BGA assembly is only enabled after successful verification. This closed-loop inspection eliminates the need for an additional inspection step while ensuring that the assembly process continues only under verified conditions.
Key capabilities:
✔ In-machine inspection of spacer presence and placement accuracy
✔ Verification immediately after spacer placement and before BGA assembly
✔ Detection of misplaced or missing spacers before processing high-value BGAs
✔ Prevention of solder bridging caused by BGA warpage during reflow
✔ Increased process stability for AI server assemblies
As BGA packages continue to grow in size and value, verifying the correct placement of support components becomes an essential part of a controlled, zero-defect placement process.