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Temporary bonding equipment market to surf on the growth of thin wafer manufacturing

June 15, 2011 // Julien Happich

Temporary bonding equipment market to surf on the growth of thin wafer manufacturing

According to a report on the thin wafer manufacturing equipment & material market from Yole Développement, the temporary bonding equipment market will grow 500% in value between 2011 and 2016. Many consumer applications will require the need for ultra-thin semiconductor wafers (down to 50µm). But as wafer thickness decreases from the traditional 500µm to 100µm and below, manufacturing challenges arise.

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Indeed, ultra-thin wafers are less stable and more vulnerable to stresses, and die can be prone to breaking and warpingnot only during grinding but also at subsequent processing steps. To address these challenges, as chip thickness is reduced, new processes including temporary bonding technologies will be required for handling such fragile wafers, specifically to support the wafer during back grinding and subsequent post-thinning processes. As tapes can no longer be used for ultra-thin wafers (main reasons are the non-uniformity of the tapes, adhesion and extreme flexibility), new wafer handling technologies have to be developed.

We are at the very start of an impressive market growth for temporary bonding technology, explains Dr. Eric Mounier, Project Manager at Yole Dveloppement.

Many different approaches in development

Temporary bonding technologies are numerous with no clear winning scenario coming out today, and the research firm has identified at least six different technologies for wafer temporary bonding with carriers. Each one of these approaches might have subtle differences in terms of chemistry, carriers and other attributes. Along with these approaches came also temporary bonding without carrier and reconstituted wafer for Fan Out WLP. So, the total number of approaches is more than 10 as of today. But this market is still in infancy and no clear temporary bonding technology is emerging. Many companies are competing to propose the best approach to achieve low cost, high temperature resistance and resolve topography issues.

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