The invention relates the rare earth modified leadless X ray barrier plastic.

本发明涉及一种稀土改性全无铅x射线屏蔽塑料。

High density packaging can he achieved by using leadless ceramic chip carriers (LCCCs).

使用无引线陶瓷芯片载体(LCCC)可以达到高密度封装。

The leadless packaging structure reduces the packaging size of the semiconductor device and reduces the product cost.

本发明缩小了半导体器件的封装尺寸，降低了产品成本。

It has passed the International General-Purpose "SGS" Testing Approval. It is especially fit for the leadless welding.

并已通过国际通用的“SGS”检测认可，特别适用于无铅焊接。

The results will enable the leadless gasoline to be produced in series and then bring a remarkable profit for the refinery.

本研究结果可使华北石油管理局第一炼油厂汽油产品实现无铅化、系列化 ，显著提高经济效益。