US3112850A - Dicing of micro-semiconductors - Google Patents

Dicing of micro-semiconductors Download PDF

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Publication number
US3112850A
US3112850A US23437362A US3112850A US 3112850 A US3112850 A US 3112850A US 23437362 A US23437362 A US 23437362A US 3112850 A US3112850 A US 3112850A
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US
United States
Prior art keywords
slab
dicing
scribed
semiconductor
wafer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
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English (en)
Inventor
Domenick J Garibotti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RTX Corp
Original Assignee
United Aircraft Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL299821D priority Critical patent/NL299821A/xx
Application filed by United Aircraft Corp filed Critical United Aircraft Corp
Priority to US23437362 priority patent/US3112850A/en
Priority to GB4095663A priority patent/GB1057127A/en
Priority to FR952251A priority patent/FR1373472A/fr
Application granted granted Critical
Publication of US3112850A publication Critical patent/US3112850A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/67005—Apparatus not specifically provided for elsewhere
    • H01L21/67011—Apparatus for manufacture or treatment
    • H01L21/67092—Apparatus for mechanical treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/10—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing sonic or ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/08—Removing material, e.g. by cutting, by hole drilling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising
    • B28D1/221—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising by thermic methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
    • B28D5/0005—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by breaking, e.g. dicing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
    • B28D5/0005—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by breaking, e.g. dicing
    • B28D5/0011—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by breaking, e.g. dicing with preliminary treatment, e.g. weakening by scoring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
    • H01J37/3002—Details
    • H01J37/3005—Observing the objects or the point of impact on the object
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
    • H01J37/305—Electron-beam or ion-beam tubes for localised treatment of objects for casting, melting, evaporating, or etching
    • H01J37/3053—Electron-beam or ion-beam tubes for localised treatment of objects for casting, melting, evaporating, or etching for evaporating or etching
    • H01J37/3056—Electron-beam or ion-beam tubes for localised treatment of objects for casting, melting, evaporating, or etching for evaporating or etching for microworking, e. g. etching of gratings or trimming of electrical components
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
    • H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
    • H01L21/26—Bombardment with radiation
    • H01L21/263—Bombardment with radiation with high-energy radiation
    • H01L21/2633—Bombardment with radiation with high-energy radiation for etching, e.g. sputteretching
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T225/00—Severing by tearing or breaking
    • Y10T225/10—Methods
    • Y10T225/12—With preliminary weakening

Definitions

  • My invention overcomes the above-mentioned disadvantages of the prior art by providing a novel method of dicing semiconductor ribbons or wafers which is faster and produces a higher yield than previously obtainable.
  • FIGURE 1 is a schematic view of an electron beam machine which is utilized to generate a high energy, precisely focused beam for scribing the semiconductor wafer or ribbon.
  • FIGURE 2 is a view of a scribed micro-semiconductor wafer.
  • FIGURE 3 is a schematic view of an ultrasonic cell in which the scribed wafer of FIGURE 2 is diced.
  • an electron beam machine is indicated generally as 10. While the scribing step of my novel process may be performed with any device, such as a Laser, which generate a highly energized and extremely finely focused beam, I have found the electron beam 21 most advantageous tool.
  • Electron beam machines are devices which use the kinetic energy of an electron beam to work a material. US. Patent No. 2,987,610, issued June 6, 1961, to K. H. Steigerwald, discloses such a machine. These machines operate by generating a highly focused beam of electrons. The electron beam is a welding, cutting and machining tool which has practically no mass but has high kinetic energy because of the extremely high velocity imparted to the electrons.
  • Machine comprises an evacuated chamber 12 containing the micro-semiconductor wafer or ribbon 14 to be diced positioned on a movable table 1.6.
  • This wafer or ribbon may be Si, Ge, GaAs, InSb, SiC, AlP etc.
  • the machine also comprises an electron beam column 18 which is in communication with chamber 12 and which contains a source of electrons, beam forming means and beam focusing means.
  • the sources of electrons comprises a directly heated cathode or filament 20 which is supplied with heating current from a filament supply, not shown, and which has a high negative acceleration volage applied thereto from a high voltage source, not shown.
  • An apertured anode 22 is positioned in the electron beam column 18 between the cathode and the material to be worked.
  • the anode is connected to the case of the machine which is grounded at 24.
  • the difference in potential between the cathode 20 and anode 22 causes the electrons emitted from the cathode to be accelerated down column 18.
  • the electrons are focused into a beam indicatcd genenally as 26 by an electron optical system com prising adjustment coils 23 and 30, and a magnetic lens assembly 32.
  • the beam impinges on the wafer or ribbon 14 where it gives up its kinetic energy in the form of heat.
  • This heating causes local evaporation of the semiconductor material and thus grooves, hereinafter referred to as lines, are scribed in the surface of the wafer or ribbon.
  • the scribing or etching is preferably done along cleavage planes when possible.
  • the width of these scribed lines can be maintained less than 0.001 inch. This, of course, is a much smaller area of waste or erosion than obtainable by any of the prior art dicing methods.
  • the wafer or ribbon may be precisely scribed along lines where division of components is desired by causing deflection of beam 26 across the surface of the wafer by means of varying the current to deflection coils 34.
  • This deflection may be controlled manually by an operator observing the wafer through an optical system comprising a penta-mirror assembly consisting of mirrors 36 and 38, a protective glass 40, a viewing light 42 for illuminating the work area and a viewing system 44 which includes means for magnifying the image of the piece being worked which is reflected thereto by the mirrors.
  • the deflection and pulsing of beam 26 will be controlled automatically by programming means such as a computer or a flying spot scanner which is scanning a negative of the pattern to be scribed.
  • the motion of table 16 may be programmed so as to cause scribing of the desired pattern by a fixed electron beam or the scribing can be accomplished by a combination of table movement and beam deflection both of which are programmed by means well known in the art.
  • the wafer or segment of ribbon After the wafer or segment of ribbon has been scribed, it is removed from the evacuated work chamber 16 and is placed in an ultrasonic cell. Such a cell is depicted in the ultrasonic energy.
  • FIGURE 3 and comprises a tank 50 vibrated by a transducer 52.
  • the frequency of vibration of transducer 52 is controlled by a frequency generator 54-.
  • Tank *50 holds a liquid 56 such as acetone or distilled water which will not react with or otherwise contaminate the semiconductor material.
  • the scribed wafer or ribbon 14 is suspended in the bath 56 and is broken along the scribed lines by I have also found it to be pos sible to fnacture the semiconductor material along the scribed lines mechanically by causing distortion of the wafer or ribbon by passing it between rubber balls of different diameter and hardness.
  • materials such as alumina, beryllia, cermets and metals such as tungsten and molybdenum which, when scribed or indented, show propensity upon loading to fracture in a brittle fashion without plastic flow and thus yield sharply defined interfaces may be formed into desired shapes by my invention.
  • Such materials, and particularly the ceramics, may not readily be shaped by other techniques such as machining or chemical milling.
  • my invention is described by way of illustration rather than limitation and accordingly, it is understood that my invention is to be limited only by the appended claims taken in view of the prior art.
  • the method of fabricating micro-semiconductor devices from a slab of semiconductor material including the steps of scribing the slab of semiconductor material with a high energy beam,
  • the method of fabricating micro-semiconductor devices from a slab of semiconductor material including the steps of scribing the slab of semiconductor material with a high energy beam
  • step of fracturing the slab includes immersing the scribed slab in the fluid medium of an ultrasonic cell and passing ultrasonic energy through the fluid medium.
  • step of scribing the slab of semiconductor material includes passing the working beam of an electron beam machine over said slab to locally evaporate part of the slab and produce lines therein.
  • the method of fabricating micro-semiconductor devices from a slab of semiconductor material including the steps of placing said slab of semiconductor material in the vacuum chamber of an electron beam machine, focusing the working beam of the electron beam machine on said slab,
  • the method of dicing notch sensitive materials including the steps of scribing a pattern of grooves in a slab of notch sensitive material with a high energy beam, and then fracturing said slab in accordance with the pattern of scribing.
  • the step of scribing includes placing the slab in the work chamber of an apparatus which generates and utilizes an intense beam of charged particles,

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mining & Mineral Resources (AREA)
  • Plasma & Fusion (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
US23437362 1962-10-31 1962-10-31 Dicing of micro-semiconductors Expired - Lifetime US3112850A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL299821D NL299821A (enrdf_load_stackoverflow) 1962-10-31
US23437362 US3112850A (en) 1962-10-31 1962-10-31 Dicing of micro-semiconductors
GB4095663A GB1057127A (en) 1962-10-31 1963-10-17 Improvements in or relating to the fabrication of micro-plates, particularly micro-seiconductor devices
FR952251A FR1373472A (fr) 1962-10-31 1963-10-30 Morcellement en dés de micro semi-conducteurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23437362 US3112850A (en) 1962-10-31 1962-10-31 Dicing of micro-semiconductors

Publications (1)

Publication Number Publication Date
US3112850A true US3112850A (en) 1963-12-03

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US23437362 Expired - Lifetime US3112850A (en) 1962-10-31 1962-10-31 Dicing of micro-semiconductors

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US (1) US3112850A (enrdf_load_stackoverflow)
GB (1) GB1057127A (enrdf_load_stackoverflow)
NL (1) NL299821A (enrdf_load_stackoverflow)

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207198A (en) * 1963-10-25 1965-09-21 Jr Clement T Beeson Method and apparatus for breaking and separating eggs
US3226527A (en) * 1963-10-23 1965-12-28 William H Harding Apparatus for perforating sheet material
US3384279A (en) * 1966-08-23 1968-05-21 Western Electric Co Methods of severing brittle material along prescribed lines
US3469076A (en) * 1967-06-01 1969-09-23 Producto Machine Co The Apparatus for removing flashing from molded plastic articles
US3474219A (en) * 1965-03-30 1969-10-21 Steigerwald Gmbh K H Machining process using radiant energy
US3610871A (en) * 1970-02-19 1971-10-05 Western Electric Co Initiation of a controlled fracture
US3629545A (en) * 1967-12-19 1971-12-21 Western Electric Co Laser substrate parting
US3634646A (en) * 1969-06-03 1972-01-11 Velcro Sa Soulie Method of and apparatus for cutting loops placed on a support for producing hooks therefrom
US3695497A (en) * 1970-08-26 1972-10-03 Ppg Industries Inc Method of severing glass
US3696742A (en) * 1969-10-06 1972-10-10 Monsanto Res Corp Method of making a stencil for screen-printing using a laser beam
US3701880A (en) * 1968-11-29 1972-10-31 Westinghouse Electric Corp Method for sculpturing an indicia or decorative design in the surface of an article with a beam of corpuscular energy
US3818577A (en) * 1971-01-15 1974-06-25 Caterpillar Tractor Co Connecting rod manufacturing
US3824678A (en) * 1970-08-31 1974-07-23 North American Rockwell Process for laser scribing beam lead semiconductor wafers
US3863333A (en) * 1973-08-31 1975-02-04 Bell Telephone Labor Inc Methods for making semiconductor devices
US3952404A (en) * 1973-07-30 1976-04-27 Sharp Kabushiki Kaisha Beam lead formation method
US3970819A (en) * 1974-11-25 1976-07-20 International Business Machines Corporation Backside laser dicing system
US3997964A (en) * 1974-09-30 1976-12-21 General Electric Company Premature breakage resistant semiconductor wafer and method for the manufacture thereof
US4019248A (en) * 1974-06-04 1977-04-26 Texas Instruments Incorporated High voltage junction semiconductor device fabrication
US4174561A (en) * 1976-02-09 1979-11-20 Semicon, Inc. Method of fabricating high intensity solar energy converter
US4203127A (en) * 1977-07-18 1980-05-13 Motorola, Inc. Package and method of packaging semiconductor wafers
US4224101A (en) * 1976-09-03 1980-09-23 U.S. Philips Corporation Method of manufacturing semiconductor devices using laser beam cutting
US4473424A (en) * 1981-06-17 1984-09-25 Sorko Ram Paul O Decorative mirrored article
US4661718A (en) * 1984-06-07 1987-04-28 Nippondenso Co., Ltd. Information and electrical power transmission system and method for vehicle
US4694568A (en) * 1982-01-07 1987-09-22 North American Philips Corporation Method of manufacturing chip resistors with edge around terminations
EP0613765A1 (de) * 1993-03-02 1994-09-07 Hoechst CeramTec Aktiengesellschaft Verfahren zum Herstellen von unterteilbaren Platten aus sprödem Material mit hoher Genauigkeit sowie Vorrichtung zum Aufnehmen und Präzisionsschleifen der Stirnseiten einer Platte
US5552675A (en) * 1959-04-08 1996-09-03 Lemelson; Jerome H. High temperature reaction apparatus
US5609284A (en) * 1992-04-02 1997-03-11 Fonon Technology Limited Method of splitting non-metallic materials
EP0863231A1 (en) * 1997-03-04 1998-09-09 Ngk Insulators, Ltd. A process for dicing a preform made of an oxide single crystal, and a process for producing functional devices
US5922224A (en) * 1996-02-09 1999-07-13 U.S. Philips Corporation Laser separation of semiconductor elements formed in a wafer of semiconductor material
US6268641B1 (en) 1998-03-30 2001-07-31 Kabushiki Kaisha Toshiba Semiconductor wafer having identification indication and method of manufacturing the same
US6489588B1 (en) 1999-11-24 2002-12-03 Applied Photonics, Inc. Method and apparatus for separating non-metallic materials
US20030180731A1 (en) * 2002-03-25 2003-09-25 Worrall Joseph A. Methods for producing glass substrates for use in biopolymeric microarrays
US20050009301A1 (en) * 2003-06-26 2005-01-13 Yusuke Nagai Semiconductor wafer dividing method utilizing laser beam
US20060110894A1 (en) * 2004-11-25 2006-05-25 Matsushita Electric Industrial Co., Ltd. Manufacturing method of semiconductor laser devices and manufacturing apparatus of the same
US20140339280A1 (en) * 2013-05-20 2014-11-20 Shenzhen China Star Optoelectronics Technology Co., Ltd. Method and Device for Scribing and Breaking Glass Substrate
US20170076982A1 (en) * 2015-09-11 2017-03-16 Kabushiki Kaisha Toshiba Device manufacturing method
US20180229331A1 (en) * 2017-02-16 2018-08-16 Disco Corporation SiC WAFER PRODUCING METHOD
US10562130B1 (en) 2018-12-29 2020-02-18 Cree, Inc. Laser-assisted method for parting crystalline material
US10576585B1 (en) 2018-12-29 2020-03-03 Cree, Inc. Laser-assisted method for parting crystalline material
US10611052B1 (en) 2019-05-17 2020-04-07 Cree, Inc. Silicon carbide wafers with relaxed positive bow and related methods
US11024501B2 (en) 2018-12-29 2021-06-01 Cree, Inc. Carrier-assisted method for parting crystalline material along laser damage region
CN114347281A (zh) * 2022-01-18 2022-04-15 锦州神工半导体股份有限公司 一种单晶硅片切割方法
DE102016200026B4 (de) 2015-01-06 2023-04-27 Disco Corporation Wafer-Herstellungsverfahern

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4401876A (en) 1980-05-20 1983-08-30 Martin Cooper Working gemstones
US5932119A (en) 1996-01-05 1999-08-03 Lazare Kaplan International, Inc. Laser marking system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2337569A (en) * 1939-05-20 1943-12-28 Pietschack Ernst Method of producing mosaic electrodes
US2778926A (en) * 1951-09-08 1957-01-22 Licentia Gmbh Method for welding and soldering by electron bombardment
US2970730A (en) * 1957-01-08 1961-02-07 Motorola Inc Dicing semiconductor wafers
US3061739A (en) * 1958-12-11 1962-10-30 Bell Telephone Labor Inc Multiple channel field effect semiconductor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2337569A (en) * 1939-05-20 1943-12-28 Pietschack Ernst Method of producing mosaic electrodes
US2778926A (en) * 1951-09-08 1957-01-22 Licentia Gmbh Method for welding and soldering by electron bombardment
US2970730A (en) * 1957-01-08 1961-02-07 Motorola Inc Dicing semiconductor wafers
US3061739A (en) * 1958-12-11 1962-10-30 Bell Telephone Labor Inc Multiple channel field effect semiconductor

Cited By (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5628881A (en) * 1959-04-08 1997-05-13 Lemelson; Jerome H. High temperature reaction method
US5552675A (en) * 1959-04-08 1996-09-03 Lemelson; Jerome H. High temperature reaction apparatus
US3226527A (en) * 1963-10-23 1965-12-28 William H Harding Apparatus for perforating sheet material
US3207198A (en) * 1963-10-25 1965-09-21 Jr Clement T Beeson Method and apparatus for breaking and separating eggs
US3474219A (en) * 1965-03-30 1969-10-21 Steigerwald Gmbh K H Machining process using radiant energy
US3384279A (en) * 1966-08-23 1968-05-21 Western Electric Co Methods of severing brittle material along prescribed lines
US3469076A (en) * 1967-06-01 1969-09-23 Producto Machine Co The Apparatus for removing flashing from molded plastic articles
US3629545A (en) * 1967-12-19 1971-12-21 Western Electric Co Laser substrate parting
US3701880A (en) * 1968-11-29 1972-10-31 Westinghouse Electric Corp Method for sculpturing an indicia or decorative design in the surface of an article with a beam of corpuscular energy
US3634646A (en) * 1969-06-03 1972-01-11 Velcro Sa Soulie Method of and apparatus for cutting loops placed on a support for producing hooks therefrom
US3696742A (en) * 1969-10-06 1972-10-10 Monsanto Res Corp Method of making a stencil for screen-printing using a laser beam
US3610871A (en) * 1970-02-19 1971-10-05 Western Electric Co Initiation of a controlled fracture
US3695497A (en) * 1970-08-26 1972-10-03 Ppg Industries Inc Method of severing glass
US3824678A (en) * 1970-08-31 1974-07-23 North American Rockwell Process for laser scribing beam lead semiconductor wafers
US3818577A (en) * 1971-01-15 1974-06-25 Caterpillar Tractor Co Connecting rod manufacturing
US3952404A (en) * 1973-07-30 1976-04-27 Sharp Kabushiki Kaisha Beam lead formation method
US3863333A (en) * 1973-08-31 1975-02-04 Bell Telephone Labor Inc Methods for making semiconductor devices
US4019248A (en) * 1974-06-04 1977-04-26 Texas Instruments Incorporated High voltage junction semiconductor device fabrication
US3997964A (en) * 1974-09-30 1976-12-21 General Electric Company Premature breakage resistant semiconductor wafer and method for the manufacture thereof
US3970819A (en) * 1974-11-25 1976-07-20 International Business Machines Corporation Backside laser dicing system
US4174561A (en) * 1976-02-09 1979-11-20 Semicon, Inc. Method of fabricating high intensity solar energy converter
US4224101A (en) * 1976-09-03 1980-09-23 U.S. Philips Corporation Method of manufacturing semiconductor devices using laser beam cutting
US4203127A (en) * 1977-07-18 1980-05-13 Motorola, Inc. Package and method of packaging semiconductor wafers
US4473424A (en) * 1981-06-17 1984-09-25 Sorko Ram Paul O Decorative mirrored article
US4694568A (en) * 1982-01-07 1987-09-22 North American Philips Corporation Method of manufacturing chip resistors with edge around terminations
US4661718A (en) * 1984-06-07 1987-04-28 Nippondenso Co., Ltd. Information and electrical power transmission system and method for vehicle
US5609284A (en) * 1992-04-02 1997-03-11 Fonon Technology Limited Method of splitting non-metallic materials
EP0613765A1 (de) * 1993-03-02 1994-09-07 Hoechst CeramTec Aktiengesellschaft Verfahren zum Herstellen von unterteilbaren Platten aus sprödem Material mit hoher Genauigkeit sowie Vorrichtung zum Aufnehmen und Präzisionsschleifen der Stirnseiten einer Platte
US5922224A (en) * 1996-02-09 1999-07-13 U.S. Philips Corporation Laser separation of semiconductor elements formed in a wafer of semiconductor material
US6257224B1 (en) 1997-03-04 2001-07-10 Ngk Insulators, Ltd. Process for working a preform made of an oxide single crystal, and a process for producing functional devices
EP0863231A1 (en) * 1997-03-04 1998-09-09 Ngk Insulators, Ltd. A process for dicing a preform made of an oxide single crystal, and a process for producing functional devices
US6268641B1 (en) 1998-03-30 2001-07-31 Kabushiki Kaisha Toshiba Semiconductor wafer having identification indication and method of manufacturing the same
US6544804B2 (en) 1998-03-30 2003-04-08 Kabushiki Kaisha Toshiba Semiconductor wafer having identification indication and method of manufacturing the same
US6660963B2 (en) 1999-11-24 2003-12-09 Applied Photonics, Inc. Method and apparatus for separating non-metallic materials
US6489588B1 (en) 1999-11-24 2002-12-03 Applied Photonics, Inc. Method and apparatus for separating non-metallic materials
US6919531B2 (en) * 2002-03-25 2005-07-19 Agilent Technologies, Inc. Methods for producing glass substrates for use in biopolymeric microarrays
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