The restriction of hazardous substances directive is an environmental directive being passed by the European Union in February 2003. It was scheduled to be effective from on July 1, 2006. It mainly aims at product ingredients and engineering process standards in manufacturing. Any electrical and electronic equipment contains hazardous substances over the regulated limitation will not be allowed to be offered on the market in European Union. Mar 31, 2015, European Union issued a directive to add four new restrictions on the concentration of phthalates that were Bis(2-ethylhexyl) phthalate (DEHP), Butyl benzyl phthalate (BBP), Dibutyl phthalate (DBP) and Diisobutyl phthalate (DIBP). The limitation of concentration by weight is 0.1% for each substance.

The phthalates which are used as plasticizers to be used in indirectly material as dicing tape for the semiconductor industry. Many related researches mentioned that temperature and time effects on the migration of DEHP, which means the product existed the risk to be contaminated. Therefore, DEHP is phased out from indirectly material to evaluate DEHP-free indirectly material. The manufacture result is shown in this study to evaluate new indirectly material without DEHP.

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