做LED灯丝朋友陶瓷灯丝在焊接中易掉怎么办?用蓝宝石没问题
Q:请教下做LED灯丝的朋友，陶瓷灯丝在焊接中易掉怎么办？客户说用蓝宝石的都没问题https://lighting.ledpan.com/ledpan1035.png
A:用焊锡肓,钨丝灯加工灯丝的时候，破损率很高。
Q:现在大多数用的都是陶瓷吧 有这个问题吗
A:这不冲突
Q:市场上用陶瓷的都用焊锡膏吗?
A:陶瓷灯丝主要优点是耐热耐高压，主要缺点在加工难度，你客户出现这样的情况也正常啊。你把这段发给客 户看看：
Ceramic is a promising new LED substrate technology. One advantage is its ability to withstandhigh heat levels extremely well. Another advantage is its high voltage operation. However, thereare a few concerns with the ceramic approach. Unlike sapphire, ceramic requires severaladditional preparation steps. For example, deposition of nickel/silver mirror on the p-contactlayer, titanium/aluminum/indium/gold for flip-bonding to the ceramic AlN substrate, and “liftoff” of the epitaxial material that is transferred onto the ceramic substrate. All of thesesteps adds cost and create potential reliability issues, which in turn, withdraws some of theultimate cost savings from the lower cost ceramic material. Another problem is the tendency forthe bonding to delaminate from the epi-layer in a high heat environment. When heat is notmanaged well, problems ensue.Additionally, since ceramic material is hard and brittle, onefailure mode consistently observed by the lighting industry is the stress cracks on ceramic- substrate-based LED caused by flexing of the printed circuit board.
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