PCB制版使用的各种封装尺寸型号，包括BGA，LQFP-PCB plate size used in a variety of package types, including BGA, LQFP, etc.

BGA是PCB上常用的组件。介绍了BGA package 的走线规则。-BGA is commonly used in PCB assembly. Describes the rules for the alignment of BGA package.