Abstract: A device for connecting and disconnecting connector parts, one movable and the other fixedly positioned within a housing (e.g., electronic cage). The device includes latches which are pivotedly arranged on the upper and lower corner portions of a protection structure covering a printed circuit card and flexible elements, in particular U-shaped springs, which are positioned on inflexible catch bar members which may be secured to or form part of the housing. The latches engage the flexible elements (which each include a cam member) only after a connection has been made between the mating connector parts. The initial position of the cams determines the magnitude of the insertion force needed to complete the connection.

Abstract: A semiconductor dielectric layer formed of silicon nitride having a uniform dispersion of carbon therein for providing reduced intrinsic tensile stresses of less than 10 .times. 10.sup.9 dyn/cm.sup.2.