Development of a Micro–Hot Embossing Mold with High Replication Fidelity

• Main Authors: Wang, Ying-Chieh, 王盈傑
• Other Authors: Kuo, Chil-Chyuan
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/89039351472794697162

碩士 === 明志科技大學 === 機械工程系機械與機電工程碩士班 === 102 === 　　In this study the Rapid Tooling (RT) technology is used to fabricate the mold for making Fresnel lens. However, the release agent must be used during the fabrication process, leading to the reduction of the replication fidelity and surface finish of epoxy resin mold. Therefore, for enhancing transcription rate and improving surface roughness, the low pressure plasma system is used in this study for surface modification of silicone such that the use of release agent can be avoided during RT process to develop the micro RT fabrication technology. 　　The results of this study indicate that, by using surface modification and rapid tooling for fabricating the hot embossing mold for Fresnel lens. The total depth and width transcription rates of epoxy resin mold fabricated by the integration of surface engineering are around 97.9 % and 97.7 %, which are improved by 1.2 % and 0.6% from the 96.7 % and 97.1 % of the total depth and width transcription rates of traditional epoxy resin. The use of optimal parameters of surface modification for testing will lead to a surface roughness of epoxy resin at 47.5 nm and a surface roughness improvement rate of 39.4 %.The oxygen atom radicals reacting with the surface of silicone will lead to oxidation at the material surface and the change of structure, and the silicone contact angle after oxygen plasma treatment is 87°. As a result, the advantages of micro-rapid tooling mold proposed in this study include simple fabrication method, reduced surface roughness, and enhanced transcription rate.