A PDMS/metal-film photo-mask for large-area contact photolithograpy at sub-micrometr scale

Y. C. Lee, Y. T. Hsieh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper reports a new type of soft PDMS/metal-film photo-mask which can be applied in contact photolithography with a resolution at sub-micrometer scale and a patterning area over a 4 wafer. This new type of photo-mask is made from a soft PDMS mold which contains a patterned metal film on the concave surface of its microstructures. The metal film can selectively block incident UV light, while the convex PDMS microstructures can guide the incident UV light to expose a PR layer. Due to its soft and compliant property, this new soft photo-mask can from intimate contact with a substrate and carry out UV exposure to form PR microstructures. It is particularly useful in patterning slightly curved substrates such as sapphire wafers, and therefore has a great potential on manufacturing patterned sapphire substrates (PSSs) in light-emitting diodes (LEDs). In this wok, both 2 and 4 PSSs with sub-micrometer feature sizes are successfully achieved. This new type of soft photo-mask and its contact photolithography can be easily implemented at a low cost for large-area, non-flat, and sub-micrometer scaled patterning, and therefore has a great potential in many applications in the future.

Original languageEnglish
Title of host publication2013 Transducers and Eurosensors XXVII
Subtitle of host publicationThe 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS 2013
Pages1970-1973
Number of pages4
DOIs
Publication statusPublished - 2013
Event2013 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS 2013 - Barcelona, Spain
Duration: 2013 Jun 162013 Jun 20

Publication series

Name2013 Transducers and Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS 2013

Other

Other2013 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS 2013
Country/TerritorySpain
CityBarcelona
Period13-06-1613-06-20

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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