US2660696A - Crystal contact device - Google Patents
Crystal contact device Download PDFInfo
- Publication number
- US2660696A US2660696A US161126A US16112650A US2660696A US 2660696 A US2660696 A US 2660696A US 161126 A US161126 A US 161126A US 16112650 A US16112650 A US 16112650A US 2660696 A US2660696 A US 2660696A
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- Prior art keywords
- contact
- wires
- crystal
- contact device
- block
- Prior art date
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- 239000013078 crystal Substances 0.000 title description 25
- 239000011810 insulating material Substances 0.000 description 5
- 230000001154 acute effect Effects 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007567 mass-production technique Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/12—Mountings, e.g. non-detachable insulating substrates
- H01L23/14—Mountings, e.g. non-detachable insulating substrates characterised by the material or its electrical properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/02—Containers; Seals
- H01L23/10—Containers; Seals characterised by the material or arrangement of seals between parts, e.g. between cap and base of the container or between leads and walls of the container
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
Definitions
- the present invention is directed toimprovements in electrical crystal contact devices. More particularly, the invention relates to electrical crystal contact devices of the kind comment, such as the contact adapted to provide an external metallic connection to the element, but only refers to contact members of the kind which are in substantially point contact with the element, commonly known as whiskers.” v
- Crystal contact devices which include two contact members having two contact points in spaced engagement with the surface of the crystalline element, are known in the art and these devices may be used for amplification of electrical signals.
- these devices such as in transistor-type signal repeaters, the spacing of the points of contact substantially afiects the repeater characteristics. Hence this spacing must be accurately determined.
- an electrical crystal contact device comprises a body of insulating material, two substantially parallel wires having a predetermined spacing therebetween secured in insulated relation to the body and having the ends thereof extending beyond the body.
- the crystal contact device also includes a semiconducting crystal having a contact surface and a conductive support maintaining the body and the crystal in fixed relation thereon with the contact surface disposed at an acute angle with reference to the axis of the wires and 2 Claims. (Cl. 317-235) making substantially a point contact with two corresponding ends of wires.
- the winding is performed by machine.
- the crystalline element may be supported by a resilient strip attached to the body.
- the body may be molded around the wires while they are maintained at the required spacing by the form.
- the wires may be left with planar ends, the element being positioned so that the contact points lie on the periphery of the planar ends.
- Fig. 1 is a perspective view representing one stage in the production of the device
- Fig. 2 is a perspective view of the completed contact-carrying portion of the device
- Fig. 3 illustrates in perspective an alternative form for the contactcarrying device
- Fig. 4 is a sectional elevation view of a complete crystal contact device utilizing the alternative form of construction illustrated in Fig. 3.
- a few turns of fine wire 3 of, for example, tungsten or Phosphor bronze, are wound around a form I comprised by a framework in the form of a hollow open ended rectangular box. These turns are wound around two opposite sides and across the openportion of the turns lying across one end. These portions of two of the turns are firmly secured to the block by a suitable insulating cement 4, such as a synthetic resin plastic cement. All the turns are then severed at points nearjopposite edges of the form I and the block 2"is withdrawn from the form framework so that the block is left with two straight wires secured to one surface, the wires having their longitudi- Description of Fig.
- the wires 3 may be fixed within a block or cylinder of insulating material, for example by molding the block or cylinder around the appropriate portions of the turns wound on the framework (not shown), or byv securing the wires 3 to the surface of one block 2 as described above and then securing another block to the first block, thereby sandwiching the wires 3 between the two blocks to form a I unitary structure. Fixing the wires within a block or cylinder in the manner just mentioned.
- Fig. 4 is a sectional elevation view of a completed crystal contact device incorporating the form of construction illustrated in Fig. 3.
- the two wire contacts 3 are firmly held between the two blocks of insulating material 2 and 5 and the complete unit is mounted onto a shaped support 8 preferably of metal.
- This support has a bent portion 9 to which is firmly fixed a crystal 6 and a lead 1 which has an area of contact with a portion of the crystal.
- the bent portion 9 is preferably disposed at an acute angle with reference to the lower surface of the main por-v tion of the support 8.
- the lower block 2 of the contact holder can be adjusted upon the support 8 until it is in such a position that satisfactory point contacts are obtained by the wires 3 against the surface of the crystal 6, the lower surface of the contact holder being then permanently affixed to the support 8 by a suitable cement, such as synthetic resin plastic cement.
- a suitable cement such as synthetic resin plastic cement.
- the whole device may, after adjustment, be fitted within a protective container of some material, such as glass, leads being provided from the ends of the contact wires remote from the crystal.
- the present invention provides a relatively simple method of spacing the wires at a predetermined distance apart.
- An electrical crystal contact device comprising: a body of insulating material; two substantially parallel wires having a predetermined spacing therebetween secured in' insulated relation to said body and having the ends thereof extending beyondsaid body; a semiconducting crystal having a contact surface; and a conductive support maintaining said body and said crystal in fixed relation thereon with said contact surface disposed at an acute angle with reference to the axes of said wires and making a substantially point contact with two corresponding ends of said wires.
- An electrical crystal contact device comprising: a laminated body of insulating material including two portions secured together at contiguous surfaces thereof; two substantially parallel wires having a predetermined spacing therebetween secured in insulated relation between said portions and having the ends thereof extending beyond said body; a semiconducting crystal having a contact surface; and a conductive support maintaining said body and said crystal in fixed relation thereon with said contact surface disposed at an acute angle with reference to the axis of said wires and making a substantially point contact with two corresponding ends of said wires.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Measuring Leads Or Probes (AREA)
Description
Nov 24, 1953 E. s. JAMES ETAL CRYSTAL CONTACT DEVICE Filed May 10, 1950 FIGS FIG.4
INVENTORS EMRYS GWYNNE JAMES 2 way 0504/? EDGAR UNDEI-L ATTORNEY lPatented Nov. 24, 1953 UNITED STATES PATENT OFFICE CRYSTAL CONTACT DEVICE and Aubrey Oscar Edgar gland, assignors to Hazel- Emrys Gwynne James Lindell, Wembley, En
tine Research, Inc., of Illinois Chicago, 11]., a corporation'- Applicatlon May 10, 1950, Serial No. 161,126
General The present invention is directed toimprovements in electrical crystal contact devices. More particularly, the invention relates to electrical crystal contact devices of the kind comment, such as the contact adapted to provide an external metallic connection to the element, but only refers to contact members of the kind which are in substantially point contact with the element, commonly known as whiskers." v
Crystal contact devices, which include two contact members having two contact points in spaced engagement with the surface of the crystalline element, are known in the art and these devices may be used for amplification of electrical signals. For certain applications of these devices, such as in transistor-type signal repeaters, the spacing of the points of contact substantially afiects the repeater characteristics. Hence this spacing must be accurately determined. Heretofore it has been relatively difficult to construct such devices in a manner which readily lends itself to the use of mass-production techniques and yet which provides an accurate predetermined spacing of the points of contact.
It is another object of the invention to provide an electrical crystal contact device which has an accurate spacing between the contact points engaging the semiconducting crystal of the device and yet which is relatively inexpensive to manufacture.
In accordance with the present invention, an electrical crystal contact device comprises a body of insulating material, two substantially parallel wires having a predetermined spacing therebetween secured in insulated relation to the body and having the ends thereof extending beyond the body. The crystal contact device also includes a semiconducting crystal having a contact surface and a conductive support maintaining the body and the crystal in fixed relation thereon with the contact surface disposed at an acute angle with reference to the axis of the wires and 2 Claims. (Cl. 317-235) making substantially a point contact with two corresponding ends of wires.
Preferably the winding is performed by machine. The crystalline element may be supported by a resilient strip attached to the body. The body may be molded around the wires while they are maintained at the required spacing by the form. The wires may be left with planar ends, the element being positioned so that the contact points lie on the periphery of the planar ends.
For a better understanding of the present invention, together with other and further objects thereof, reference is had to the following description taken in connection with the accompanying drawing, and its scope will be pointed out in the appended claims.
One method of manufacturing a crystal contact device according to the present invention will now be described by way of example with reference to the accompanying drawing wherein Fig. 1 is a perspective view representing one stage in the production of the device; Fig. 2 is a perspective view of the completed contact-carrying portion of the device; Fig. 3 illustrates in perspective an alternative form for the contactcarrying device; and Fig. 4 is a sectional elevation view of a complete crystal contact device utilizing the alternative form of construction illustrated in Fig. 3.
Description of Fig. 1 and Fig. 2 operations Referring now to Fig. 1, a few turns of fine wire 3 of, for example, tungsten or Phosphor bronze, are wound around a form I comprised by a framework in the form of a hollow open ended rectangular box. These turns are wound around two opposite sides and across the openportion of the turns lying across one end. These portions of two of the turns are firmly secured to the block by a suitable insulating cement 4, such as a synthetic resin plastic cement. All the turns are then severed at points nearjopposite edges of the form I and the block 2"is withdrawn from the form framework so that the block is left with two straight wires secured to one surface, the wires having their longitudi- Description of Fig. 3 structure In the modification of the above arrangement illustrated in Fig. 3, the wires 3 may be fixed within a block or cylinder of insulating material, for example by molding the block or cylinder around the appropriate portions of the turns wound on the framework (not shown), or byv securing the wires 3 to the surface of one block 2 as described above and then securing another block to the first block, thereby sandwiching the wires 3 between the two blocks to form a I unitary structure. Fixing the wires within a block or cylinder in the manner just mentioned.
overcomes the likelihood of the wires being forced off the block by lateral pressure when the wires are brought into engagement with a.
crystalline element in'the manner presently to be described.
Description of completed contact device of Fig. 4
Fig. 4 is a sectional elevation view of a completed crystal contact device incorporating the form of construction illustrated in Fig. 3. The two wire contacts 3 are firmly held between the two blocks of insulating material 2 and 5 and the complete unit is mounted onto a shaped support 8 preferably of metal. This support has a bent portion 9 to which is firmly fixed a crystal 6 and a lead 1 which has an area of contact with a portion of the crystal. The bent portion 9 is preferably disposed at an acute angle with reference to the lower surface of the main por-v tion of the support 8. In assembly, the lower block 2 of the contact holder can be adjusted upon the support 8 until it is in such a position that satisfactory point contacts are obtained by the wires 3 against the surface of the crystal 6, the lower surface of the contact holder being then permanently affixed to the support 8 by a suitable cement, such as synthetic resin plastic cement. The whole device may, after adjustment, be fitted within a protective container of some material, such as glass, leads being provided from the ends of the contact wires remote from the crystal.
The contact ends of the wires 3, 3 may be pointed in known manner, for example by etch-= ing, or they may be left with planar ends perpendicular to the longitudinal axes of the wires.' In this latter case, in order to provide substantially point contacts, the contact surface of the element will be positioned to lie in a plane which is inclined at an angle to the planar ends of the wires less than ninety degrees. The contact points for the wires will then be points on the' periphery of the planar ends. In any arrangement, however, the axes of the wires are prefer-' ably not perpendicular to the plane in which the contact surface of the crystalline element lies.
The reason for this is that if, when bringing the ends of the wires into contact with the element, one wire makes contact with the element first, this wire can slide over the surface until the other wire comes into contact with the element.
As it may be desired to employ contact members using wire of 0.05 to 0.15 millimeter diameter with a spacing of the order of 0.1 to 0.2 millimeter between the longitudinal axes of the wires, it will be appreciated that the present invention provides a relatively simple method of spacing the wires at a predetermined distance apart.
While there have been described what are at present consideredto be the preferred embodiments of this invention, it will be obvious to those skilled in the art that various changes and modifications may be made therein without departing from the invention, and it is, therefore, aimed to cover all such changes and modifications as fall within the true spirit and scope of the invention.
What is claimed is:
1. An electrical crystal contact device comprising: a body of insulating material; two substantially parallel wires having a predetermined spacing therebetween secured in' insulated relation to said body and having the ends thereof extending beyondsaid body; a semiconducting crystal having a contact surface; and a conductive support maintaining said body and said crystal in fixed relation thereon with said contact surface disposed at an acute angle with reference to the axes of said wires and making a substantially point contact with two corresponding ends of said wires.
2. An electrical crystal contact device comprising: a laminated body of insulating material including two portions secured together at contiguous surfaces thereof; two substantially parallel wires having a predetermined spacing therebetween secured in insulated relation between said portions and having the ends thereof extending beyond said body; a semiconducting crystal having a contact surface; and a conductive support maintaining said body and said crystal in fixed relation thereon with said contact surface disposed at an acute angle with reference to the axis of said wires and making a substantially point contact with two corresponding ends of said wires.
EMRYS GWYNNE JAMES.
AUBREY OSCAR EDGAR LINDELL.
References Cited in the file of this patent UNITED STATES PATENTS
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US161126A US2660696A (en) | 1950-05-10 | 1950-05-10 | Crystal contact device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US161126A US2660696A (en) | 1950-05-10 | 1950-05-10 | Crystal contact device |
Publications (1)
Publication Number | Publication Date |
---|---|
US2660696A true US2660696A (en) | 1953-11-24 |
Family
ID=22579933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US161126A Expired - Lifetime US2660696A (en) | 1950-05-10 | 1950-05-10 | Crystal contact device |
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Country | Link |
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US (1) | US2660696A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2753495A (en) * | 1952-04-08 | 1956-07-03 | Bell Telephone Labor Inc | Point contact translators |
US2762956A (en) * | 1952-07-19 | 1956-09-11 | Sylvania Electric Prod | Semi-conductor devices and methods |
US2869053A (en) * | 1953-05-22 | 1959-01-13 | Motorola Inc | Transistor unit |
US2946936A (en) * | 1954-03-05 | 1960-07-26 | Motorola Inc | Semiconductor device |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2338036A (en) * | 1941-08-08 | 1943-12-28 | Bell Telephone Labor Inc | Cathode ray device |
US2415841A (en) * | 1944-12-14 | 1947-02-18 | Bell Telephone Labor Inc | Conducting material and device and method of making them |
US2429823A (en) * | 1944-05-01 | 1947-10-28 | Gen Electric | Crystal detector |
US2430028A (en) * | 1943-03-16 | 1947-11-04 | Bell Telephone Labor Inc | Translating device and method of making it |
US2434286A (en) * | 1943-08-12 | 1948-01-13 | Bell Telephone Labor Inc | Method of forming a point at the end of a wire |
US2521661A (en) * | 1947-10-11 | 1950-09-05 | Brush Dev Co | Electrotransducer element |
US2540490A (en) * | 1948-03-29 | 1951-02-06 | Philips Lab Inc | Electron device with semiconductive target |
US2560792A (en) * | 1948-02-26 | 1951-07-17 | Bell Telephone Labor Inc | Electrolytic surface treatment of germanium |
US2561123A (en) * | 1950-04-04 | 1951-07-17 | Rca Corp | Multicontact semiconductor devices |
US2561109A (en) * | 1950-03-29 | 1951-07-17 | Rca Corp | Semiconductor device |
US2606960A (en) * | 1949-06-01 | 1952-08-12 | Bell Telephone Labor Inc | Semiconductor translating device |
-
1950
- 1950-05-10 US US161126A patent/US2660696A/en not_active Expired - Lifetime
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2338036A (en) * | 1941-08-08 | 1943-12-28 | Bell Telephone Labor Inc | Cathode ray device |
US2430028A (en) * | 1943-03-16 | 1947-11-04 | Bell Telephone Labor Inc | Translating device and method of making it |
US2434286A (en) * | 1943-08-12 | 1948-01-13 | Bell Telephone Labor Inc | Method of forming a point at the end of a wire |
US2429823A (en) * | 1944-05-01 | 1947-10-28 | Gen Electric | Crystal detector |
US2415841A (en) * | 1944-12-14 | 1947-02-18 | Bell Telephone Labor Inc | Conducting material and device and method of making them |
US2521661A (en) * | 1947-10-11 | 1950-09-05 | Brush Dev Co | Electrotransducer element |
US2560792A (en) * | 1948-02-26 | 1951-07-17 | Bell Telephone Labor Inc | Electrolytic surface treatment of germanium |
US2540490A (en) * | 1948-03-29 | 1951-02-06 | Philips Lab Inc | Electron device with semiconductive target |
US2606960A (en) * | 1949-06-01 | 1952-08-12 | Bell Telephone Labor Inc | Semiconductor translating device |
US2561109A (en) * | 1950-03-29 | 1951-07-17 | Rca Corp | Semiconductor device |
US2561123A (en) * | 1950-04-04 | 1951-07-17 | Rca Corp | Multicontact semiconductor devices |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2753495A (en) * | 1952-04-08 | 1956-07-03 | Bell Telephone Labor Inc | Point contact translators |
US2762956A (en) * | 1952-07-19 | 1956-09-11 | Sylvania Electric Prod | Semi-conductor devices and methods |
US2869053A (en) * | 1953-05-22 | 1959-01-13 | Motorola Inc | Transistor unit |
US2946936A (en) * | 1954-03-05 | 1960-07-26 | Motorola Inc | Semiconductor device |
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