Disclosed is a suspension spring for a vibrating piezoelectric plate including a first part fixed on a base and a second part for supporting the vibrating plate, the second part a tongue having a first and second end, the second end of the tongue supporting the vibrating plate, the spring being designed so that the end of the tongue which is the closest to the fixing point of the first part to the base is that which supports the vibrating plate.
A piezoelectric component-mounting foil and foil making method are disclosed, whereby a first portion of the foil in a first plane substantially parallel to a second portion of the foil in a second plane are connected by a central portion not in the first or second plane, the central portion having at least one width dimension of the central portion less than at least one length dimension of the central portion. A conductive foil material, appropriate thickness, overall geometry, and, if desired, appropriate notch configuration are selected for a desired implementation of the foil for conductively attaching and at least partially supporting at least one piezoelectric component such as a quartz crystal.
An assembly includes a Surface Acoustic Wave (SAW) component disposed within a housing or capsule by supports which support the component close to, but not in contact with, the bottom of the housing or capsule, thereby allowing some movement of at least portions of the component within the housing or capsule.
The present invention relates to a process for controlled dissolution of a crystalline material consisting of a number of kinds of ions, in a solution containing a solvent for the crystalline material. Before dissolution, the solution contains at least two kinds of ions of the crystalline material. The molar concentration of ion of each kind is higher than zero and lower than the molar concentration of ion of each kind which the solution would have at saturation if it contained all of the constituent ions of the crystalline material, under the temperature and pressure conditions of the dissolution.
An insert terminal containing case includes a bottom wall, four side walls, and an opening at the upper portion, wherein a terminal made of a metal plate is vertically fixed to at least one of the four side walls by insert molding. A groove is vertically arranged at the outer side surface of the side wall fixing the terminal, the groove extending downward, the outer side surface of the terminal is partially exposed at the groove, and the inner side surface opposite the outer side surface of the terminal exposed at the groove is partially exposed at the inner side surface of the side wall. Therefore, when the terminal is provided in the case by insert molding, molding can be performed only using upper and lower dies. Furthermore, the terminal can be reliably exposed at the inner surface of the side wall. The insert terminal containing case has the minimum difference between the opening dimension of the case and the dimension of a piezoelectric diaphragm and is molded without using a sliding die.
A damped cradle for a pressure sensitive device is constructed in a unitary form. The cradle has a base that is attached to a substrate. Extending upward from the base are side arms with pairs of spring, or compliant, tips that contact the sides of the pressure sensitive device. Also extending upward from the base over the top of the pressure sensitive device are spring arms with compliant tips that contact the top surface of the pressure sensitive device in non-active areas. Vibrational forces in lateral (X-Y plane) directions are damped by friction between the bottom of the pressure sensitive device and the surface of the substrate, and vibration motion in the vertical, or Z, direction is stopped by enough spring force to overcome the maximum acceleration force the crystal mass encompasses for a given application. The spring forces of the spring tips and spring arms are balanced to produce a near zero pressure on the pressure sensitive device in both static and dynamic modes.
