Is PTH and small via hole wall quality checked by cross-section and followed by a closed loop corrective action?

是否通过切片检验pth与小导通孔孔壁状况，并有相应的改善对策跟踪？

youdao

Is PTH and small via hole wall quality checked by cross-section and followed by a closed loop corrective action?

是否通过切片检验pth与小导通孔孔壁状况，并有相应的改善对策跟踪？

youdao