A Study of Development of Micro fluidics -Chips with Micro Channels and Through Holes by LIGA and Thermoplastic Injection Molding

• Main Authors: Ying-Tsung Yang, 楊英琮
• Other Authors: Shih-jung LIU
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/41645522885762119873

碩士 === 國立雲林科技大學 === 機械工程系碩士班 === 93 === This study focus on manufacturing bio-chips within micro channels and through holes. It is an integration of UV-LIGA and micro molding processes. The micro mold has been designed and analyzed by the mold filling simulation first. In order to mold a plate with through holes, the mold should have micro pillars in one side and mapping micro holes in the other side. The micro pillar array can be fabricated by the UV-LIGA, and later it would be used to manufacture micro holes in the other mold half by M-EDM. Micro injection molding was used to produce low-cost，high-precision，and high-value products. Both micro and nano technology help develop products toward more slight、more thin、and smaller. It is great importance to decrease the dimensions of biochips and to have them mass-produced and decrease cost. This project used UV-LIGA technology to manufacture microstructure instead of traditional technology and used the injection molding method to produce biochips instead of hot-press method. Because the structure and dimensions are getting more and more complicated. CAE method is used to help predict the quality of product and improve the weakness before molding. Since the thicknesses of the product and gates become more thinner , the time for the melt to solidify becomes much shorter. Higher injection rate is regarded, and it is very important for our experimental observation & simulation results in order to prevent short-shot of the product.In this thin wall molding case, the effect of holding time is much less significant on the shrinkage due to very fast solidification. The temperature is also an important factor that will affect the quality of products.The shrinkage of dimensions will increase when we use higher mold temperature, but it could improve the degree of replication of microstructures .