The boom of semiconductor device fabrication industry spurs an increasing demand for semiconducting materials. To make such raw materials more easily obtainable, the US-based chemical supplier Alfa Chemistry recently announces to release varieties of materials that could be used for lithography, a very important step in the manufacturing of IC manufacturing.

The manufacture of semiconductor devices involves a sequence of many photolithographic and chemical processing steps, for instance, surface passivation, thermal oxidation, planar diffusion and junction isolation. During this process, electronic circuits are gradually created on a wafer made of pure semiconducting material. Different semiconductor materials are used for different application purposes.

“In general, a typical photolithography process would cover steps like substrate preparation, photoresist spin coating, pre-baking, exposure, post-exposure baking, development and post-baking,” says the Marketing Chief of Alfa Chemistry. “We now provide a variety of products to support lithography research, including lithography monomers, photoresists, as well as stamps for nanoprint lithography and microcontact printing.”

Lithography Monomers
The lithography monomers offered by Alfa Chemistry are mainly alicyclic/etch-resistant monomers and fluorine-containing monomers for 157 nm uv lithography resist polymers. To name just a few here: triarylsulfonium hexafluorophosphate salts, mixed (cas 109037-77-6), (4-phenylthiophenyl)diphenylsulfonium triflate (cas 111281-12-0), (4-methoxyphenyl)diphenylsulfonium triflate (cas 116808-67-4), bis(4-tert-butylphenyl)iodonium p-toluenesulfonate (cas 131717-99-2), triphenylsulfonium perfluoro-1-butanesufonate (cas 144317-44-2), poly(dimethylsiloxane), diglycidyl ether terminated (cas 130167-23-6), polyphthalaldehyde, etc.

There are three types of photoresists, namely, negative resists, photo cationic initiators, and photoacid generators. Some of the photoresists provided by Alfa Chemistry are: poly(dimethylsiloxane), hydroxy terminated (cas 70131-67-8), bis(4-tert-butylphenyl)iodium hexafluorophosphate (cas 61358-25-6), poly(dimethylsiloxane), monoglycidyl ether terminated (cas 157723-26-7), poly(cyclohexyl methacrylate) (cas 25768-50-7), poly(methylhydrosiloxane) (cas 63148-57-2), etc.

Stamps for Nanoprint Lithography & Microcontact Printing
The stamps used in nanoimprint lithography and microcontact printing include but not limited to: poly(lauryl methacrylate) solution (cas 25719-52-2), gold coated microscope slide (cas 7440-57-5), poly(methyl methacrylate) (cas 9011-14-7), fluorine doped tin oxide coated glass slide, poly(2-hydroxyethyl methacrylate) (cas 25249-16-5), lanthanum aluminum oxide (cas 12003-65-5), magnesium aluminate (cas 12068-51-8), aluminum oxide (cas 1344-28-1), and more.

Please visit to learn more about Alfa Chemistry's offering of semiconductor materials such as high purity wet chemicals.

Author's Bio: 

With advanced technology and strong expertise, Alfa Chemistry is a reliable partner for leading companies in the semiconductor industry, offering an extensive product portfolio of semiconductor materials that could be used in micro and nanoelectronics, organic and printed electronics and semiconductor industry. Meanwhile, it also provides tailored solutions such as wafer manufacturing, MEMS support, semiconductor support, and semiconductor analysis & quality control. Alfa Chemistry is a perfect choice to measure impurities in chemicals used in semiconductor manufacturing or test contaminants in silicon wafers or final components.