 Current mirror arrays |
| A multiplying current mirror array which controls two units of output current (n=2) with one unit ... |
|
| On-line oil-in-wax monitoring apparatus and method |
| What is claimed is: 1. An on-line oil-in-wax monitor comprising means for periodically sampling a ... |
|
| Magnetometer having coil formed by two spiral shaped conductors |
| A simple design for a fluxgate magnetometer is shown in FIGS. 1A and 1B. A thin layer of magnetic ... |
|
| Magnetic recording head motion translation apparatus for head/media evaluation systems |
| OF THE PREFERRED EMBODIMENT In reference to FIG. 1 of the drawing, there is shown a partially-... |
|
| Air bladder apparatus for positioning a magnetic head |
| I claim: 1. A magnetic head load-unload device for use with an actuator in the recording and ... |
|
| Electric generator that operates with few ampere-turns in field winding |
| OF PREFERRED EMBODIMENTS Referring particularly to FIGS. 1 and 2, the numeral 20 generally denotes ... |
|
| AC Generator with low noise claw tooth rotor |
| According to the present invention, in order to decrease the magnetic sound which is generated due ... |
|
| Dynamoelectric machines for multiples of three phases with unbalanced fractional-slot windings |
| This invention relates to dynamoelectric machines such as synchronous motors for operation from an A... |
|
|
Method for mounting a semiconductor device in a housing
| Details |
Inventors: Exner, Klaus D.;
Assignee: Siemens Aktiengesellschaft (Berlin and Munich, DE)
Primary Examiner: Sheehan; John P.
Assistant Examiner:
Attorney, Agent or Firm: Lerner; Herbert L., Greenberg; Laurence A.
Method and apparatus for mounting a semiconductor device in a housing, which includes first providing a metallization on a part of the surface of the semiconductor body of the semiconductor device to be connected to the housing, subsequently permanently connecting the semiconductor body to a part of the housing being in the form of a substrate with an organic adhesive to which metal particles have been added, and connecting electrodes of the semiconductor device to terminals disposed in the housing. |
|
DETAILED DESCRIPTION There are claimed: 1.
Method of mounting a semiconductor device in a housing, which comprises first providing a chromium layer on a part of the surface of the monocrystalline silicon semiconductor body of the semiconductor device to be connected to the housing, covering the chromium layer with a silver layer, subsequently permanently connecting the sliver layer on the chromium layer on the monocrystalline silicon semiconductor body to a part of the housing being in the form of a substrate with an adhesive to which silver particles have been added, and connecting electrodes of the semiconductor device with wire connections to terminals disposed in the housing.
2.
Method according to claim 1, which comprises using Z-silicone adhesive as the adhesive.
3.
Method according to claim 1 or 2, which comprises applying the silver layer by one of the groups of steps consisting of vapor deposition and sputtering.
4.
Method according to claim 3, which comprises providing the silver layer at an elevated temperature.
5.
Method according to claim 3, which comprises providing silicon as the semiconductor body.
6.
Method according to claim 5, which comprises applying the chromium layer by one of the groups of steps consisting of vapor deposition and sputtering.
7.
Method according to claim 6, which comprises providing monocrystalline silicon as the semiconductor body, reducing the thickness of the semiconductor body by grinding the rear side thereof, subsequently applying the chromium as an intermediate metallic layer in vapor deposition equipment, subsequently applying the silver metallization on the chromium layer, using a heat-conducting material as the substrate, connecting the rear side of the semiconductor body after deposition and grinding to the heat-conducting substrate with the adhesive, and subsequently hardening the adhesive by heat treatment.
8.
Method according to claim 7, which comprises adjusting the metal content of the adhesive to at least 50 volume percent.
9.
Method according to claim 2, which comprises diluting the adhesive with approximately 10 volume percent of an organic solvent
|
| Related patents |
|
|
Method of producing a microwave filter comprising a body of gyromagnetic material and a source of a prepolarizing magnetic field whose resonant frequency is a predetermined function of the temperature
What is claimed is: 1. A method of fabricating a microwave filter with a resonant frequency which is a predetermined function of temperature, said filter having a ...
|
|
|
Method of and apparatus for determining cement strength and extent of setting with a pulsed nuclear magnetic resonance spectrometer
OF THE INVENTION Briefly, the practice of the present invention involves a method of and apparatus for analyzing a cement sample to determine both the extent of setting ...
|
|
|
Apparatus for the detection of substances and in particular explosives by neutron irradiation thereof
We claim: 1. Apparatus for the detection of a substance liable to be contained in an object (34) comprising: a first inspection station (I to IV), first irradiation ...
|
|
|
CMOS shift register with complementary refresh pass gates and buffer
FIG. 1 is a circuit diagram of a CMOS shift register constructed in accordance with prior technology. The shift register includes pass gates 14, 18, 22 and 26, ...
|
|
|
Nuclear magnetic resonance diagnostic apparatus
To achieve the foregoing objects, and in accordance with the purpose of the invention as embodied and broadly described herein, nuclear magnetic resonance diagnostic ...
|
|
|
Mutual inductance NMR RF coil matching device
An NMR scanner apparatus includes an RF coil for transmitting and receiving radio frequency signals. When the coil is operated in the transmitting mode, it is coupled to ...
|
|
|
Patient handling arrangements for NMR imaging systems
What is claimed is: 1. In a nuclear magnetic resonance imaging system, including a magnet housing containing a magnet having a bore in which a subject to be imaged is to ...
|
|
|
Self-shielded gradient coils for nuclear magnetic resonance imaging
These and other objects are achieved in a coil system for producing a magnetic field which comprises first and second coils. The first coil is adapted to be coupled to a ...
|
|
|
Thermal and electromagnetic shield for power meter
I claim: 1. A power meter having a base, an electronic meter mechanism mounted on the base to be connected in an electrical circuit for metering power used in the ...
|
|
|
RF shield for RF coil contained within gradient coils of NMR imaging device
OF THE INVENTION Referring initially to FIG. 1, a radio-frequency (RF) shield 10, in accordance with the present invention is a hollow cylindrical conductive member ...
|
|
|
Metal Working 
