Device for the alignment of a part and a substrate for carrying the part

• US 4,404,741 A
• Filed: 10/09/1981
• Issued: 09/20/1983
• Est. Priority Date: 05/19/1980
• Status: Expired due to Fees

• Current Assignee: Farco SA Rue Girardet 29 2400 Le Locle Switzerland
• Original Assignee: Les Fabriques D'Assortiments Reunies
• Inventors: Lebet, Jean-Philippe, Matthey-Doret, Fernand, Peterle, Leonardo
• Primary Examiner(s): Hall, Carl E.
• Application Number:
  US06/309,907
• Time in Patent Office: 711 Days
• Field of Search: 29/740, 29/741, 29/721, 29/760, 29/833, 29/834, 29/835, 29/836, 269/73, 269/71, 269/903, 74/479, 74/471 X, 192/84 A, 228/6 A, 228/180 A, 228/49 R, 228/49 A
• US Class Current: 29/721
• CPC Class Codes: B23Q 1/28 Means for securing sliding members in any desired position
• CPC Class Codes: B23Q 1/38 using fluid bearings or fluid cushion supports
• CPC Class Codes: B23Q 1/48 with sliding pairs and rotating pairs B23Q1/46 takes precedence
• CPC Class Codes: H01L 21/68 for positioning, orientation or alignment
• CPC Class Codes: H05K 13/0015 Orientation; Alignment; Positioning
• CPC Class Codes: Y10S 269/903 Work holder for electrical circuit assemblages or wiring systems
• CPC Class Codes: Y10T 29/49131 by utilizing optical sighting device
• CPC Class Codes: Y10T 29/49133 with component orienting
• CPC Class Codes: Y10T 29/53091 for work-holder for assembly or disassembly
• CPC Class Codes: Y10T 29/53178 Chip component
• CPC Class Codes: Y10T 29/53265 with work-holder for assembly
• CPC Class Codes: Y10T 74/20207 Multiple controlling elements for single controlled element

Abstract

Device for the alignment of a part 12 and of a substrate 10 designed to receive it. The device contains a plate 2, on the horizontal flat upper surface 3 of which an XY table 5 can slide, a blocking device 16 for temporarily interrupting any translation of the XY table 5, but leaving it free to rotate on a given vertical axis 4, a gripping device 11 and an optical viewing device 15. The blocking device 16 preferably consists of an electromagnet mounted for rotation in a bore of the plate 2.

Claims

1. A device for the alignment of a part and of a substrate designed to receive said part, said device comprising:

a plate having a horizontal flat upper surface, said plate being mounted on a fixed base;

an XY moving table connected with a movable base, said movable base mounted for sliding movement relative to said upper surface of the plate, said table supporting said substrate;

a blocking device for momentarily preventing translational movement of the movable base on said upper surface, but allowing said base to rotate about a given vertical axis;

a gripping device to bring the part over the substrate approximately along said given vertical axis and to deposit it vertically onto said substrate; and

an optical device for viewing the part and the substrate with the direction of observation being along said given vertical axis.

2. A device according to claim 1, wherein said blocking device comprises an electromagnet freely mounted to rotate along said given vertical axis, said electromagnet being mounted in a bore in said plate, said plate being firmly fastened to said fixed base, said electromagnet developing a force of attraction sufficient to hold the movable base of the XY moving table radially when it is temporarily activated.

3. A device according to claim 2, comprising a spring washer in said bore of said fixed base urging said electromagnet against a lower surface of the movable base.

4. A device according to claim 2 or 3, comprising a spring member acting to angularly return said electromagnet, said spring member working with a pin extending from the electromagnet from the side opposite the movable base.

5. A device according to claim 2 or 3, wherein said gripping device contains a transparent suction nozzle.

6. A device according to claim 5, wherein said nozzle comprises a square sheet containing a radial feed channel emerging in the center of said sheet.

7. A device according to claim 6, wherein said feed channel extends along one of the diagonals of the square sheet.

8. A device according to claim 2 or 3, wherein said movable base contains on its lower surface at least one recess selectively connected to a high or low pressure source.