Method of removing a component from a substrate

• US 5,837,556 A
• Filed: 01/06/1997
• Issued: 11/17/1998
• Est. Priority Date: 01/06/1997
• Status: Expired due to Fees

• Current Assignee: Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Geralds, Donald J., Ostendorf, Dennis R.
• Primary Examiner(s): GRAYBILL, DAVID E
• Application Number:
  US08/778,619
• Time in Patent Office: 680 Days
• Field of Search: 438/4, 438/977, 438/434, 438/485, 156/344, 29/264, 29/762, 29/764
• US Class Current: 438/4
• CPC Class Codes: H01R 12/7005 Guiding, mounting, polarizing or locking means; Extractors for printed circuit boards H05K
• CPC Class Codes: H01R 13/633 for disengagement only in combination with safety switch H01R13/7132
• CPC Class Codes: H05K 13/0486 Replacement and removal of components
• CPC Class Codes: Y10S 438/977 Thinning or removal of substrate
• CPC Class Codes: Y10T 29/53274 Means to disassemble electrical device
• CPC Class Codes: Y10T 29/53283 Means comprising hand-manipulatable implement
• CPC Class Codes: Y10T 29/53883 Screw threaded work-engager

Abstract

A method of removing a component bonded to a substrate utilizes a fixture having a bore therethrough which is aligned with a bore in the substrate. A screw is advanced in the bore in the fixture to cause a push pin to contact the component and force the component away from the substrate.

Claims

1. A method of disassembling an electrical component from a substrate wherein the substrate includes a first bore and the component is releasably bonded to a first face of the substrate over the first bore, the method comprising the steps of:

providing a fixture for accepting the substrate wherein the fixture has a second bore and a pin in the bore;

securing a second face of the substrate opposing its first face to the fixture such that the first bore is aligned with the second bore;

pushing the pin through the aligned bores into contact with the component; and

advancing the pin against the component to force the component away from the substrate.

2. The method of claim 1, wherein the step of advancing the pin comprises the step of screwing a screw to apply a force against the pin.

3. The method of claim 2, including the further step of supplying a ball bearing between the screw and the pin.

4. The method of claim 1, wherein the step of securing the substrate comprises the step of clamping the substrate to the fixture.

5. The method of claim 1, wherein the fixture includes a plurality of further bores therethrough and wherein a plurality of further pins are disposed in the plurality of further bores and including the additional step of moving the plurality of further pins against the component.

6. The method of claim 5, wherein the step of moving includes the step of screwing a screw against a ball bearing to apply a force against each further pin.

7. The method of claim 1, wherein the component is secured to the substrate by a bonding layer and including the further step of heating the bonding layer to soften same.

8. The method of claim 7, wherein the bonding layer comprises an adhesive.

9. A method of disassembling an electrical component from a substrate wherein the substrate includes a first plurality of bores and the electrical component is releasably bonded to the substrate over the first plurality of bores, the method comprising the steps of:

providing a fixture for accepting the substrate wherein the fixture has a second plurality of bores;

securing the substrate to the fixture such that at least one of the first plurality of bores is aligned with one of the second plurality of bores to form at least one pair of aligned bores;

inserting a pin into each pair of aligned bores;

inserting a pusher member into each pair of aligned bores to force the pin therein into contact with the electrical component; and

advancing each pusher member to force the electrical component away from the substrate.

10. The method of claim 9, including the further step of placing a ball bearing into each pair of aligned bores between the pin and the pusher member.

11. The method of claim 10, wherein at least one of the bores of each aligned pair of bores is threaded and the pusher member comprises a screw and wherein the step of advancing comprises the step of screwing each screw into a threaded bore.

12. The method of claim 11, wherein there are at least two screws in at least two threaded bores and the step of advancing comprises the step of screwing the screws into the threaded bores.

13. The method of claim 12, wherein the electrical component is secured by a plurality of layers of an adhesive to the substrate and further including the step of heating the adhesive layers to soften same before the advancing step.

14. A method of disassembling an electrical component from a substrate wherein the substrate includes a first plurality of bores and the electrical component is releasably bonded by an adhesive to the substrate over the first plurality of bores, the method comprising the steps of:

providing a fixture for accepting the substrate wherein the fixture has a second plurality of bores each which is threaded;

securing the substrate to the fixture such that each of the first plurality of bores is aligned with one of the second plurality of bores to form pairs of aligned bores;

inserting a pin into each pair of aligned bores;

inserting a ball bearing into each pair of aligned bores;

screwing a screw into each of the second plurality of bores to force the ball bearing against the pin therein and to force the pin into contact with the electrical component; and

continuing to screw each screw to cause the pin to force the electrical component away from the substrate.

15. The method of claim 14, wherein the electrical component is secured by two layers of adhesive to the substrate and further including the step of heating the layers of adhesive to soften same.