Successful Development of Aplanador®, CMP Slurry for Copper Interconnects with Epoch-making Planarization Performance

Asahi Glass Co. Ltd. (Head Office: Tokyo; President & CEO: Masahiro Kadomatsu) has  succeeded in developing a CMP (Chemical Mechanical Polishing) slurry for copper interconnects  (product name: Aplanador®) that hardly generates any dishing (a dent on the interconnect) caused  by copper CMP during the production process of copper interconnects for semiconductor  integrated circuits.

With a traditional product, as dishing of about 500Å (angstroms) appears  during the polishing process, a thick coating must be placed over the copper to secure proper  interconnect thickness. Actually dishing itself has been a critical factor that has drastically  lowered the yield rate. As a result, we posted high production costs.

The new Aplanador® will  enable us to make the copper coating thinner and reduce processing times for both coating and  CMP. Moreover with only minimal dishing, we expect a remarkable improvement in the yield  rate as well as a radical decline in production costs for semiconductor integrated circuits.  High-performance semiconductor integrated circuits such as microprocessors and memory in line  with the micronization of processes tend to increase the interconnect resistance value and thereby  prompt heat generation, reducing the yield rate and preventing improvement in the process core  speed. For this reason, the industry is accelerating the shift from aluminum, currently the most  common wiring material, to lower-resistance copper. Accordingly the market for CMP slurries  for copper interconnects which was worth roughly 40 billion yen in 2005 has been posting an  annual growth rate of 20%.

Since 1993, Asahi Glass Co. Ltd. at its fully-owned subsidiary, Seimi Chemical Co. Ltd. (Head  Office: Kanagawa; President & CEO: Yutaka Ando) has been engaged in the production and sales  of CMP slurries for STI using its own micro-grinding production technology for cerium oxide  (CeO2). Taking advantage of its capability to manage the full production cycle including the  selection of materials, Asahi Glass has been servicing customers around the globe. Meanwhile in  2004 the company launched the first CMP slurry for copper interconnects for Silica (SiO2). We  continued to develop CMP slurries as a key growth product component in our Electronics &  Energy business, the third pillar under the company’s “JIKKO-2007” medium-term management  plan. Consequently, we successfully completed the development of Aplanador® offering  epoch-making planarization performance.

We will begin in December 2006 distributing samples of Aplanador® and start mass production in  2007. To achieve our goal of attaining by 2010 a minimum of 25% of the global share in the  market for CMP slurries for copper interconnects, we will found a new office in Taiwan as well as  current Japan, Europe and America, Shanghai, a Singaporean office. We also plan on exploring the  opening of global production sites.

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