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Recent efforts in plastic injection molding have produced high value-added moldings, such as thinner wall optical waveguides and elements, and micropattern molded surfaces. As the capability of mold processing machines and the precision of injection molding processes have improved, molding quality requirements have become correspondingly more stringent. In the field of molding development, one of the technical challenges is how to form a product using the mold provided with a micropattern on its surface (especially a product with a high aspect ratio). This report reviews the mold processing technology (LIGA: Lithographie Galvanoformung Abformung) for high aspect products and the technology of high aspect injection molding (AMOTEC: Asahi Molding Technology with CO2), and also reports on the experimental results of molding produced by using a LIGA stamper and AMOTEC injection molding.
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