摘要:
A method for adjusting the frequency of a piezoelectic resonator such as a quartz crystal is disclosed. The resonator is placed within its enclosure facing a metallic surface. The atmosphere within the enclosure is made suitable for supporting a glow discharge. An electrical potential is then established between the resonator electrode and the metallic surface causing mass to sputter between the electrode and to the metallic surface to vary the characteristics of the resonator.
摘要:
A method utilizing a localized electrical field to precisely determine the surface contour of a substantially flat wafer of piezoelectric material having a slight convexity in its opposing faces.
摘要:
A crystal is mounted on a low, centrally located pedestal. Connections to the lower side of the crystal are made by way of conductive areas on the pedestal. Multiple wiring connections are made at the edges of the crystal by allowing the bonding tool to depress the edge of the crystal so that the crystal bonding pad is supported by the base structure only during the bonding process, then released thereafter to allow free vibration of the crystal plate. Complex circuitry, possibly involving more than one frequency can thus be put onto one plate.
摘要:
A field emission display (100) includes a dielectric layer (132) having a plurality of emitter wells (134), a plurality of electron emitters (136) disposed one each within the plurality of emitter wells (134), a plurality of conductive rows (138, 140, 142) disposed on the dielectric layer (132) and having sacrificial portions (154), an ion shield (139) disposed on the dielectric layer (132) and spaced apart from the sacrificial portions (154) of the plurality of conductive rows (138, 140, 142), and an anode (121) opposing the plurality of electron emitters (136) and defining a projected area (122) at the plurality of conductive rows (138, 140, 142). The sacrificial portions (154) of the plurality of conductive rows (138, 140, 142) extend beyond the projected area (122) of the anode (121).
摘要:
A process for manufacturing of a field emission device (100, 200) including the steps of i) providing a substrate (101, 201), ii) forming a conductive row (106, 206), ii) forming a dielectric layer (102, 202), iv) forming a resist layer (116, 216), v) forming a self-assembled monolayer (112, 212) of a self-assembled monolayer-forming molecular species on the resist layer (116, 216) so that the self-assembled monolayer (112, 212) defines an etch pattern for an emitter well (107, 207), vi) etching the resist layer (116, 216), vii) etching the dielectric layer ((102, 202), viii) forming conductive column (103, 203), and ix) forming the electron-emitter structure (105, 208) within the emitter well (107, 207).
摘要:
An apparatus (95) and method for patterning a surface of an article (30), the apparatus (95) including a large-area stamp (50) for forming a self-assembled monolayer (36) (SAM) of a molecular species (38) on the surface (34) of a layer (32) of resist material, which is formed on the surface of the article (30). The large-area stamp (50) includes a layer (52) of an elastomer and has, embedded within it, mechanical structures (68, 80) which stiffen the large-area stamp (50) and deform it to control the stamped patterns. The method includes the steps of: forming a layer (32) of resist material is on the surface of the article (30), utilizing the large-area stamp (50) to form the SAM (36) on the surface (34) of the layer (32) of resist material, etching the layer (32) of resist material, and thereafter etching or plating the surface of the article (30).
摘要:
A heterostructure electron emitter including a substrate having a surface with a predetermined potential barrier and a quantum well formed in the substrate adjacent the surface. Contacts are positioned on the substrate for coupling free electrons to the substrate and into the quantum well. An acoustic wave device is positioned on the substrate so as to direct acoustic waves to strike the free electrons in the quantum well and excite the free electrons sufficiently to cause the free electrons to overcome the potential barrier and to be emitted from the surface of the substrate.
摘要:
A gridded spacer assembly (130, 230) for a field emission display (100, 200) includes a plurality of spacers (135, 235), a focusing grid (132, 232) having a plurality of spacer apertures (133) in which the spacers (135, 235) are disposed and to which the spacers (135, 235) are affixed adjacent their lower end, a stabilization grid (138, 238) having a plurality of spacer apertures (137) in registration with the spacer apertures (133) of the focusing grid (132, 232), the spacers (135, 235) being disposed therein and affixed thereto adjacent their upper end, the focusing grid (132, 232) and the stabilization grid (138, 238) having a plurality of focusing apertures (139) for collimating and focusing a beam of electrons (150).
摘要:
A piezoelectric device package consists of a base and a cover which are sealed together to hermetically seal a piezoelectric device such as a quartz crystal therebetween. A recess in the cover receives the quartz crystal. Feedthrough holes in the base, or the cover, or both, which have electrostatic seals formed over them provide a means for making electrical connections with the quartz wafer while still maintaining the hermetic seal.
摘要:
An apparatus and a method utilizing a localized electrical field to precisely determine the surface contour of a substantially flat wafer of piezoelectric material having a slight convexity in its opposing faces.