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As the leading industrial solid-state laser manufacturer,RFH laser company offer 355nm ultraviolet (UV) laser,nanosecond 532nm green laser and customized laser ,power range in 3W ,5W ,10W ,15W,18W,35W,for marking plastics,gla
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Shenzhen RFH Laser Technology Co.,Ltd was founded in 2007 with headquarters in Shenzhen High-Tech Industrial Park, branch offices in Wuhan and Suzhou and production base in Huiyang.
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After 16 years of development, RFH now has an industrial laser oriented R&D team made up of top professionals and experts from both home and abroad. Its R&D departments cover engineering, laser and electric.
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纳秒紫外绿光激光器切割蓝宝石衬底LED芯片
Release time:2021/09/15
纳秒紫外绿光激光器切割蓝宝石衬底LED芯片

LED芯片研制不断向高效高亮度方向发展。传统的芯片切割方式如金刚刀划片,砂轮刀锯切因其效率低,成品率不高已逐渐落伍,不能满足现代化生产的需要,目前紫外绿光激光切割方式正逐渐取代传统切割,成为目前主流切割方式。
激光切割又分为表层切割和内部切割,即隐形切割。它采用一定波长的激光聚焦在晶片表面或内部,在极短时间内释放大量的热量,使材料熔化甚至气化,配合激光头的移动或物件的移动,形成切割痕迹,实现切割的目的。表层切割后,激光产生的高能量瞬间破坏了蓝宝石的晶格结构,侧面激光灼烧痕迹阻挡了 LED芯片的出光,对芯片外量子效率影响较大。
蓝宝石衬底LED芯片激光切对LED芯片晶圆沿裂痕方向施以外力,使芯片分隔成独立的发光单元。本发明对于蓝宝石衬底较厚晶圆的切割,能有效提升其切割成品率,并减少了蓝宝石斜裂现象。
关键词: 紫外绿光激光器
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