Description

<style>.e_editor div,e_editor p,e_editor td,e_editor th{font-weight:inherit;font-size:inherit;font-style:inherit;font-family:inherit;}.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 10px;text-indent:0em;font:12px/24px Arial,'microsoft yahei','Times New Roman','b8bf53';}</style> <div class="e_p"> In the recent weeks, we have had a lot of inquiries for heavy copper requirements. Just this past week we had a request for 105um copper ( 3 oz) and still maintain .15mm trace spacing. Not an easy task at all and with today’s technology it is not doable. </div> <div class="e_p"> However, it is a good question but you need a minimum of .25mm and .30mm is standard spacing with 3 <a href="https://www.allpcb.com/pcb_copper_thickness.html" target="_blank">oz copper</a>. The customer is looking for this type of work in production quantities of 1k-10k pcs of smaller but decent sized opportunities which we can easily accomplish &nbsp;if they are able to back off of their .15mm spacing requirement. </div> <div class="e_p"> This product is for one of our international customers based in France who have a vested interested in solid circuit board solutions provider.&nbsp; Not only have we been able to provide solid support by delivering product fabricated in China and delivered to France, the speed at which we can turn projects is unique. </div> <div class="e_p"> Our current max capability for heavy copper is over 6oz for production and 8oz for prototypes and smaller volumes. &nbsp;There are very few shops you will meet that can do 6-8oz boards in 10 days with class III quality. We hinge on doing working for very successful companies like Raytheon to whom we built a 22 layer blind and <a href="https://www.allpcb.com/pcb/vias.html" target="_blank">buried via</a> board with 3oz copper for. We fabricated 50rigid circuit boardspcs in just 10 days.&nbsp; We could have turned the boards quicker if the customer was willing to pay an expedite charge – so the capability of doing&nbsp; very complex, heavy copper weight, PCBs is certainly there. </div> <div class="e_p"> For quick reference, we have outlined the below copper weights and their weight translations for your quick translations- for most PCB materials, we have copper with: </div> <div class="e_p"> 0.5 oz = 18 um </div> <div class="e_p"> 1.0 oz = 35um </div> <div class="e_p"> 2.0 oz = 70 um </div> <div class="e_p"> 3.0 oz = 105 um </div> <div class="e_p"> 4.0 oz = 140 um </div> <div class="e_p"> 5.0 oz = 175 um </div> <div class="e_p"> 6.0 oz = 210 um </div> <div class="e_p"> 7.0 oz = 245 um </div> <div class="e_p"> 8.0 oz = 280 um </div> <div class="e_p"> 9.0 oz = 315 um </div>