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"> Hi All, </div> <div class="e_p"> Ok, now i have hit a brick wall with our design department and due to limited space on our standard sized boards we are going down the Double-Sided route. </div> <div class="e_p"> We have a 8 zone (4 Top/Bottom) Quad ZCR Convection (Ok! you can stop laughing!) and i dont have any experience of this type of contruction or thermal mass. </div> <div class="e_p"> All BGA's are plastic both top and bottom. some BGA's have one directly ont he reverse side. </div> <div class="e_p"> Any useful direction as in what i need to do to proces this new design as now im concerned over the process, im hoping it is like doing the same with QFP's, but in reality i know its not that simple.. </div> <div class="e_p"> Can anyone help please? </div> </div>