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http://dx.doi.org/10.6117/kmeps.2014.21.3.001

Bumpless Interconnect System for Fine-pitch Devices  

Kim, Sarah Eunkyung (Seoul National University of Science and Technology)
Publication Information
Journal of the Microelectronics and Packaging Society / v.21, no.3, 2014 , pp. 1-6 More about this Journal
Abstract
The demand for fine-pitch devices is increasing due to an increase in I/O pin count, a reduction in power consumption, and a miniaturization of chip and package. In addition non-scalability of Cu pillar/Sn cap or Pb-free solder structure for fine-pitch interconnection leads to the development of bumpless interconnection system. Few bumpless interconnect systems such as BBUL technology, SAB technology, SAM technology, Cu-toCu thermocompression technology, and WOW's bumpless technology using an adhesive have been reviewed in this paper: The key requirements for Cu bumpless technology are the planarization, contamination-free surface, and surface activation.
Keywords
Bumpless; Interconnect; Fine-pitch; Cu bonding;
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