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The Ultimate Wire Bond Coupon is designed using the best thin film metalization available for gold wire bonding and eutectic die attach. Companies and organizations keep a kit of the coupons in-house to validate wire bond machine set up, tool and wire evaluation, hot gas die bonding set up, and employee training. If you can't wire bond or get good results with eutectic die attach (using backside die metalization, gold/tin, or gold germanium) to the Ultimate Bonding Coupon, you won't be able to accomplish much on other substrates. Each bonding coupon lot has been certified to meet wire bond destruct pull strengths of more than a 12 gram mean.