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Strength surface-mount

The moisture resistance properties of filled molding compounds are enhanced by the treatment of the fillers with silane adhesion promoters prior to compounding. Silane promoters on wollastonite fillers in thermoplastic polyester molding compounds (50 percent filled) will improve the flexural strength after 16 h in 50°C water by as much as 40 percent. Silane-treated silica fillers have been found to significantly increase the moisture resistance of epoxy adhesives used in the electronics industry for chip, surface-mounted, and printed-circuit processes.8... [Pg.188]

Thus, components that are surface mounted with adhesives must maintain their strength and electrical properties during and after these combined environments and after repeated stresses. To assure reliabiUty, numerous accelerated tests have been developed and incorporated in military and industry specifications. Among specifications governing the mechanical, electrical, and quaUfication requirements for electronic components, modules, subsystems, and systems, most of which could not be met without using qualified and reliable adhesives, are MIL-STD-883, MIL-STD-810, MlL-STD-202, and MIL-PRF-38534. ... [Pg.245]

Chipbonder 3617/ Loctite Stencil application for surface-mount devices requiring high speed and hi wet strengths 32,000/NA 300-550 Rounded 60-100 mm/sec (2.4-3.9 in/sec), snap-off [1 mm (39 mils)], squeegee pressure (4—6 N/cm)... [Pg.218]

Henkel offers its Hysol KOI052 rapid cure, silver-filled epoxy-based conductive adhesive to bond the cathodes in the construction of surface mount tantalum capacitors. This adhesive is suitable for in-line curing in as little as 20 seconds at elevated temperatures (200 °C). Features of this adhesive include a low volatile content, reduced voiding, low electrical resistance and high peel strength. [Pg.31]

Tackiness is the ability of a solder paste to hold surface mount components in place between placement and reflow soldering. The tackiness of a paste is one indicator of whether the paste is still usable. Tack strength provides a measure of a pastes ability of retaining a component in place. Whereas solder paste tack life in an indication of how long a solder paste can hold a... [Pg.503]

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Mount

Surface mounting

Surfaces strength

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