Laser selective transfer process of barium strontium titanate (BST) on a sapphire substrate

Masayuki Fujita, Toshihiro Somekawa, Tetsuo Samoto, Hideki Hirano, Kousuke Hikichi, Shuji Tanaka, Masayoshi Esashi

Research output: Contribution to conferencePaper

Abstract

We have been developing the laser selective transfer techniques to transfer Barium Strontium Titanate (BST), which has excellent dielectric properties, prepared on a heat-resistant sapphire substrate to the target substrate. As a sample, Pt/BST/Au structures were made on a sapphire substrate. The laser was irradiated from the backside of the substrate, which weakens Pt/sapphire adhesion. After the laser irradiation, the substrate was separated at Pt/sapphire interface and the BST was transferred to the target substrate. In order to optimize the laser irradiation conditions, the dependences of the transfer process on laser wavelengths (1064nm and 532nm) and pulsewidths (10ns and 200ns) were investigated. After the laser irradiation, we evaluated the shape and number of the BST pixels by adhesion tape test based on ISO2409. Shorter wavelength and longer pulsewidth gave us better results of damageless laser transfer process.

Original languageEnglish
Pages783-786
Number of pages4
Publication statusPublished - 2013 Dec 1
Event32nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2013 - Miami, FL, United States
Duration: 2013 Oct 62013 Oct 10

Other

Other32nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2013
CountryUnited States
CityMiami, FL
Period13/10/613/10/10

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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    Fujita, M., Somekawa, T., Samoto, T., Hirano, H., Hikichi, K., Tanaka, S., & Esashi, M. (2013). Laser selective transfer process of barium strontium titanate (BST) on a sapphire substrate. 783-786. Paper presented at 32nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2013, Miami, FL, United States.