Description

<style>.e_editor{font:14px/24px Roboto,Helvetica,Tahoma,Arial,'Microsoft YaHei','b8bf53';}.e_editor div,e_editor p,e_editor td,e_editor th,e_editor li{font-weight:inherit;font-size:inherit;font-style:inherit;font-family:inherit;}.e_editor ul{margin:-10px 0 20px;}.e_editor li{padding:5px 0;}.e_table{width:96%;border-collapse:collapse;empty-cells:show;}.e_table th,.e_table td{padding:5px;border:2px solid #eee;}.e_img{padding:10px 0;text-align:center;}.e_p{line-height:20px;padding:0 0 20px;text-indent:0em;}</style> <div class="e_editor"> <div class="e_p"> We are experiencing an issue with RoHS boards delaminating during SMT. In tyring to determine root cause, our board mfg house states the issue is with the laminate. </div> <div class="e_p"> The laminate supplier states that the board house is not taking the proper precuations in preventing moisture absorption prior to processing. They state that due to the higher temperatures of RoHS processing, additional care must be implemented to ensure that there is no residual moisture during storage prior to processing (i.e. environmentally controlled storage required), and that a pre-bake should be performed prior to assembly. </div> <div class="e_p"> Is this increased sensitivity of RoHS boards to moisture standard? We have not had any issue with the non-RoHS boards, so we are confident that this is isolated to just the RoHS boards. </div> <div class="e_p"> Any advice would be appreciated. </div> <div class="e_p"> Thanks. </div> </div>