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Several series of bipolar small molecules have been synthesized and studied as charge balancing materials for homojunction OLED applications.(1-3) The bipolar molecules consisted of several components including a hole transporting arylamine moiety, an electron transporting oxadiazole moiety and an emitting polycyclic aromatic moiety. The achievement of charge balance was confirmed via time-of-flight...
A number of new bonding techniques are emerging with the development of three dimensional (3D) stacking packaging. High temperature joint generated by low temperature process with traditional soldering process was one of the approaches to meet the bonding requirement for 3D packaging. Cu/Cu was bonded with joint gap of 100 micros and 60 micros via a layer of Sn plated on the Cu surface. Coupons were...
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