Abstract: A method and apparatus for effecting a hermetic seal between an electronic component package and a package cover is disclosed. The method includes the steps of bonding a heater layer of conductive material to a sealing area of the package. A sealing material is then applied over a sealing area of the package cover. Optionally, a layer of sealing material may be applied over the conductive heater layer. The package and cover are contacted together and an electric current induced to flow within the conductive heater layer. The sealing material reacts to the heat caused by the electric current flowing in the heater layer, and bonds to the heater layer to effect a hermetic seal. Additionally, the seal can be intentionally broken by a reheating process to allow for repair or replacement of the electronic components contained within the package, and then resealed by the above described method.

Abstract: A process and apparatus for sealing electronic packages and lids involves placing a heater preform device between the sealing surfaces of the package and lid. If the package and lid are ceramic, the preform may be metallic having a glass coating fused thereto. Similar glass coatings would be fused to the sealing surfaces of the package and lid. The metallic portion of the preform is then heated by, for example, passing an electrical current therethrough to melt the glass and effect the seal.

Abstract: A process and apparatus for sealing electronic packages and lids involves placing a heater preform device between the sealing surfaces of the package and lid. If the package and lid are ceramic, the preform may be metallic having a glass coating fused thereto. Similar glass coatings would be fused to the sealing surfaces of the package and lid. The metallic portion of the preform is then heated by, for example, passing an electrical current therethrough to melt the glass and effect the seal.

Abstract: A process and apparatus for sealing electronic packages and lids involves placing a heater preform device between the sealing surfaces of the package and lid. If the package and lid are ceramic, the preform may be metallic having a glass coating fused thereto. Similar glass coatings would be fused to the sealing surfaces of the package and lid. The metallic portion of the preform is then heated by, for example, passing an electrical current therethrough to melt the glass and effect the seal.

Abstract: Apparatus is described to measure the pulsatile waveform caused by blood flow to the two ocular globes through which impairment of the blood flow in one internal carotid artery relative to the other is indicative of extracranial carotid occlusive disease.Specifically, apparatus comprising eye cups having an orifice therethrough adhering to the eye by vacuum means enable connective flexible tubing interior air channel access for pressure transducers to measure the ocular globe pulsations. The flexible tubing connecting the eye cup and transducer is additionally connected to a plurality of valves, vacuum pump, and regulator, whereby the regulator and the vacuum pump create a desired partial vacuum and, by means of valves, isolation of air channels between each ocular globe and respective transducer may be accomplished.