Abstract: A leadless ceramic chip carrier (LCCC) is attached to an organic printed wiring board (PWB) via a Kapton.RTM. landing interface member. The LCCC terminals are soldered to conductors on the interface member whose conductors are also soldered to mating conductors on the PWB. The member is epoxied to the PWB to hold the member in place during vapor phase solder reflow of the different solder joints.

Abstract: Fabric useful in sheet roofing is given longer life through inclusion of low-elongation threads adjacent fabric reinforcement edges.

Abstract: A method of testing the adhesion between a coating and its substrate applies a force to a sample by means of a plunger and supporting ring apparatus. The force is increased laterally while the force and the resulting deflection are measured. When the slope of the force-deflection curve changes abruptly, the test is terminated, and the value of force required to produce that condition is noted. The test is nondestructive.

Abstract: Material useful as sheet roofing is made up of a foraminous, stress-free reinforcing layer covered with layers of titanium dioxide bearing unplasticized chlorinated polyethylene.

Abstract: The IF portion of a television receiver includes a surface acoustic wave filter comprising at least two conductors having electrodes extending therefrom to form comb-shaped elements mounted on one surface of a piezoelectric substrate. Respective electrodes of the comb-shaped elements are interleaved in alternated relationship to form a transducer for launching an acoustic signal along the surface of the substrate in response to an electrical signal coupled between the two conductors. The overlap of each pair of alternated electrodes is substantially uniform throughout the transducer. The transducer includes two end portions and a center portion between the end portions. However, because the location of the center of each pair of alternated electrodes from the location of the center of an adjacent pair of alternated electrodes is substantially the same throughout the transducer, the transducer is continuous.