BTCs often feature a large central thermal pad to dissipate heat.

Without traditional leads to absorb stress, the reliability of a BTC depends entirely on the solder joint's integrity.

New sections detail the latest methods for X-ray inspection and the delicate process of reworking BTCs without damaging the board. How to Access IPC-7093A

The standard is widely used by PCB designers, process engineers, and quality managers. You can obtain the official document in several formats:

It includes comprehensive descriptions of common assembly defects—such as component "floating," skewing, or twisting—and how to prevent them through proper land pattern design.

The standard provides a step-by-step process for stencil apertures, often recommending a "window pane" or "checkerboard" pattern to manage solder volume and reduce voiding.