Finally, three basic preforms for wirebonding are simulated and analyzed, and the results show that preform, especially that with two plastic phases, can help to obtain ideal wire loop profile with better neck and less sagging.

• 结果表明，反向段有利于引线理想轮廓颈部的形成，并能减轻引线轮廓的下垂；应用2个塑性变形段更有利于理想轮廓颈部的形成，且轮廓的高度有所减小。