Active alignment of optical components in cameras and sensor modules has become common practice. In this method, lenses and detectors are mated with an adhesive in place, their alignment is actively controlled by computer, and the adhesive is set by UV irradiation. By design, most of the assemblies constructed by this method contain some opaque materials, and dual-cure adhesives that can be set by either UV light or heat are required. As a further requirement, some components are temperature sensitive and can not be heated above 90-100 °C. ACW offers Dual-Cure epoxy adhesives for active alignment assembly that meet these difficult demands.
ACW Dual-Cure adhesives are epoxy-only formulations, as opposed to epoxy-acrylate hybrids, so that only one polymer network is produced. We offer a range of viscosities and thixotropic indices to fit your process requirements. The cured adhesives have high Tg (≥160 °C) and excellent adhesion and environmental performance. Moreover, the A1800 series of Dual-Cure adhesives cure thermally at 85-90 °C.
A series of adhesives with varying viscosities are listed below. These are thixotropic resins and the viscosity listed is for 25.0 °C and a shear rate of 10/s. The thixotropic indices at 25.0 °C (TI = η at shear 1/s divided by η at shear 10/s) also are listed. For more details, click on the data sheet hyperlinks below or contact ACW at firstname.lastname@example.org.
A1853-TX η = 65,000 cps, TI = 7 data_sheet
A1855-TX η = 65,000 cps, TI = 7 (high depth of cure) data_sheet
A1858-TX η = 27,000 cps, TI = 4 (high depth of cure) data_sheet
A1867-TX η = 12,000 cps, TI = 2 (high depth of cure) data_sheet