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The possibility that Carclo, a West Yorkshire-based high-tech plastics specialist, could break into the smartphone and tablet computer market with its range of sensors for touch screen applications has propelled investor interest. However, the details of the firm that is installing and selling Carclo's technology remain opaque due to commercial confidentiality agreements, but the interims showed the first tangible returns from smartphone-related business with the company due to earn a $10m (£6.3m) milestone payment by the end of the year.