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Development of Highly Reliable Flip-chip Bonding Technology using Non-conductive Adhesives (NCAs) for 20 um Pitch Application

Title
Development of Highly Reliable Flip-chip Bonding Technology using Non-conductive Adhesives (NCAs) for 20 um Pitch Application
Author
김영호
Keywords
Flip-chip devices,; Joints; Tin; Reliability; Bonding; Moisture; Silicon compounds
Issue Date
2013-05
Publisher
IEEE
Citation
IEEE 63rd Electronic Components and Technology Conference, 2013, P.785-789
Abstract
A 20 μm pitch flip-chip bonding with Sn/Cu bumps and nonconductive adhesives (NCAs) was developed to satisfy the requirement for high density electronic packaging. The Sn/Cu bumps of a 20 μm pitch are peripheral distributed in a line. The bonding process was performed at 150°C for 10 s using three commercial NCAs. All the joints were successfully fabricated with NCAs, and have similar contact resistance values, regardless of NCA type. To evaluate the reliability, a thermal cycling (T/C) test (-55°C/125°C, 1000 cycles) and a temperature and humidity (T&H) test (70°C/95% RH, 1000 h) were performed. The effect of NCA type on reliability was investigated. NCA, which has lower moisture absorption and a lower coefficient of thermal expansion, had the best performance in a reliability test. Our results showed that bonding using Sn/Cu bumps and NCA can be applied in ultra-fine pitch (less than 20 μm) flip-chip bonding if the proper NCA is selected.
URI
https://ieeexplore.ieee.org/document/6575662/http://repository.hanyang.ac.kr/handle/20.500.11754/71086
ISBN
978-1-4799-0233-0; 978-1-4799-0232-3
ISSN
0569-5503
DOI
10.1109/ECTC.2013.6575662
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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