Adhesion Performance and UV-Curing Behaviors of Interpenetrated Structured Pressure Sensitive Adhesives with 3-MPTS for Si-Wafer Dicing Process

作者：Lee Seung Woo; Park Ji Won; Lee Yong Hee; Kim Hyun Joong^*; Rafailovich Miriam; Sokolov Jonathon

来源：Journal of Adhesion Science and Technology, 2012, 26(10-11): 1629-1643.

DOI：10.1163/156856111X618452

• Pressure sensitive adhesives
• Si-wafer
• UV irradiation
• dicing tapes
• interpenetrating polymer networks (IPN)

As Si-wafers, as used in the electronic industry, become thinner and thinner, it is important to investigate the conditions which are suitable for easily peelable acrylic dicing tapes. In the 'pick-up' process, the adhesion strength decreased after UV irradiation as a result of polymer network formation. In this study, interpenetrating polymer network (IPN) structured acrylic pressure sensitive adhesives (PSAs) were investigated with two different types of UV irradiation - a steady UV irradiation and a pulsed UV irradiation of 100 mJ/cm(2). The PSAs binder contained 2-ethylhexyl acrylate (2-EHA), acrylic acid (AA) and 3-methacryloxypropyl trimethoxysilane (3-MPTS). The hexafunctional monomer, dipentaerythritol hexacrylate (DPHA) and 3-methacryloxypropyl trimethoxysilane (3-MPTS) were used as diluent monomers. The adhesion performance as related to the peel strength and the tack properties on the Si-wafer substrates, was examined with increasing UV dose. The effect of UV-curing on the behavior and viscoelastic properties of the 'pick-up' acrylic tapes was investigated using Fourier transform infrared - attenuated total reflectance spectroscopy (FTIR-ATR) and an advanced rheometric expansion system (ARES). It is also necessary to consider the contaminants on the Si-wafer substrates left behind after releasing the dicing tapes, because of possible damage to the Si-wafers and subsequent processes. Field emission scanning electron microscopy (FE-SEM) and X-ray photoelectron spectroscopy (XPS) analysis revealed little residue on the Si-wafer after removing the tapes and after more than the specific level of UV dose.

• 出版日期2012