Study of a Low-Temperature Bonding Process for a Next-Generation Flexible Display Module Using Transverse Ultrasound

被引:1
|
作者
Ji, Myeong-Gu [1 ]
Song, Chun-Sam [2 ]
Kim, Joo-Hyun [3 ]
Kim, Jong-Hyeong [4 ]
机构
[1] Seoul Natl Univ Sci & Technol, Sch NID Fus Nano Micro Robot Syst, Seoul, South Korea
[2] LTS, R&D Ctr Inc, Uiwang Si, South Korea
[3] Kookmin Univ, Sch Mech Engn, Seoul, South Korea
[4] Seoul Natl Univ Sci & Technol, Sch Mech Design & Automat Engn, Seoul, South Korea
关键词
Ultrasonic Bonding; Low Temperature Bonding; Metal Bump Direct Bonding; FPCB; Display Module;
D O I
10.3795/KSME-A.2012.36.4.395
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
This is direct bonding many of the metal bumps between FPCB and HPCB substrate. By using an ultrasonic horn mounted on an ultrasonic bonding machine, it is possible to bond gold pads onto the FPCB and HPCB at room temperature without an adhesive like ACA or NCA and high heat and solder. This ultrasonic bonding technology minimizes damage to the material. The process conditions evaluated for obtaining a greater bonding strength than 0.6 kgf, which is commercially required, were 40 kHz of frequency; 0.6MPa of bonding pressure; and 0.5, 1.0, 1.5, and 2.0 s of bonding time. The peel off test was performed for evaluating bonding strength, which was found to be more than 0.80 kgf.
引用
收藏
页码:395 / 403
页数:9
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