A thin film metal oxide-metal oxide heterojunction nonlinear resistor is described. A non-symmetrical embodiment wherein zinc oxide and bismuth oxide are employed provides exemplary nonlinear characteristics for triggering or transient suppression applications. A symmetrical embodiment which includes a sandwich-like structure of one metal oxide between layers of a second metal oxide provides similar characteristics in a symmetrical form.

A flat electrolytic capacitor section is provided with a vapor barrier by sealing the section in an insulating, heat-sealable polyester, polyolefin, perflouroethylene, or cellophane film.

A solar cell has as its transparent electrical contact a grid made from a non-noble metal by providing a layer of copper oxide between the transparent electrical contact and the absorber-generator.

Method and apparatus for high-sensitivity optoacoustic (OA) spectroscopy of condensed matter in thin layer form. The layer to be investigated is to be in intimate contact with a solid substrate that is essentially transparent to the probe radiation, and that is capable of transmitting ultrasonic vibrations. Intermittent probe radiation, focused to a diameter typically 10.sup.-3 -1 cm when incident on the layer, cause local heating and dimensional change in the irradiated region of the layer. The...

A miniature flexible air ionizer comprises a first pair of insulating strips having a series of conductive emitters between them, and a second pair of insulating strips having a linear conductor between them and a second linear conductor on that surface of a strip of the second pair which is most remote from the emitter. The emitters and conductors are provided by laminating copper on plastic strips and chemically etching. The emitters are comb-shaped, with teeth having flat ends which are expos...

A multilayer display device with thin-film transistor circuits for sequentially switching a common brightness control signal to a plurality of individual display elements.

Thin, stable, low surface energy perfluorinated polymer films can be applied to a substrate by glow discharging the substrate in the presence of a perfluorocycloalkane or -cycloolefin or perfluoroalkyl-substituted derivatives thereof.

Thin-line solar energy collectors are disclosed. The solar collectors of this invention function by internally redirecting incident light to the periphery of the collector where it is absorbed by a heat transfer fluid. This is accomplished by reducing the angular dispersion of the incident light with a high index of refraction glass, reflecting the light from wedge shaped surfaces and then transporting the light to the periphery of the collector module via total internal reflection. A typical co...

This invention provides a thin film magnetic head composed of at least one conductive body layer formed in a magnetic material substrate with grooves therein, each groove being filled with a non-magnetic material, an insulating layer formed on the face of the magnetic material substrate including the conductive body layers, and a magnetic material layer formed on the insulating body layer. To precisely form the groove, an electrolytic etching process of the substrate and an annealing process of ...

A thin-walled plate provided with at least one reamed hole for mounting the plate on a centering element which extends through the hole, the largest dimension of the reamed hole in one direction being smaller than the smallest dimension of the centering element in the same direction, and with at least two elongate perforations located adjacent, and at opposite sides of, the hole and spaced from the edge of the hole to define plate portions in the form of bars between the perforations and the hol...