Method for orienting discrete parts

Patent metadata

Field	Value
Publication number	US-9622357-B2
Application number	US-201414271057-A
Country	US
Kind code	B2
Filing date	May 6, 2014
Priority date	May 6, 2014
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

Systems and methods for positioning a component on a surface or substrate including the steps of applying a coating to a selected deposit area of the surface, each deposit area defining at least a portion of a perimeter of an alignment area, depositing an fluid on the coating, and depositing, dropping, or otherwise positioning the component above the alignment area are disclosed.

First claim

We claim:

1. A method of positioning a component on a surface of a substrate, the method comprising:
applying a coating to the surface, to define a first deposit region, a second deposit region, and an alignment area between the first and second deposit regions, the alignment area configured to interface with and electrically couple to the component;
depositing an alignment medium onto the first and second deposit areas to form a first volume of alignment fluid and a second volume of alignment fluid; and
positioning the component above the alignment area and between the first and second volumes of alignment fluid, wherein the component has a tapered shape and only interfaces with and electrically couples to the alignment area in the first orientation.

2. The method of claim 1 , wherein the first and second volumes of alignment fluid align the component with the alignment area.

3. The method of claim 1 , wherein:
the coating comprises a hydrophilic material; and
the alignment medium comprises water.

4. The method of claim 1 , wherein:
the coating comprises an oleophilic material; and
the alignment medium comprises and oil.

5. The method of claim 1 , wherein the alignment medium is performed by a vapor deposition process.

6. The method of claim 1 , wherein depositing the alignment medium comprises:
immersing the surface in a bath of alignment medium; and
removing the substrate from the bath of alignment medium.

7. The method of claim 1 , further comprising:
disposing a low surface energy coating upon at least one external surface of the component, wherein the low surface energy coating comprises one of the group consisting of hydrophobic and oleophobic coatings.

8. The method of claim 1 , further comprising:
determining whether the component is not aligned with the alignment area; and in response, agitating the substract.

9. The method of claim 1 , further comprising removing the alignment medium after determining that the component is in contact with the alignment area.

10. The method of claim 1 , further comprising curing the alignment medium after determining that the component is in contact with the alignment area.

11. the method claim 1 , further comprising:
agitating the substrate until the component is in contact with the alignment area.

12. A method of positioning a component on a surface of a substrate, the method comprising:
applying a first coating to a selected area of the surface, the coating defining at least a portion of the perimeter of an alignment area;
applying a second coating to an exterior surface of the component;
depositing a first fluid on the first coating to define a first bead of fluid;
depositing a second fluid on the second coating to define a second bead of fluid; and
positioning the component above the alignment area and adjacent to the first bead of fluid such that the first bead of fluid and the second bead of fluid coalesce.

13. The method of claim 12 , wherein the first coating comprises a hydrophilic coating and the first fluid comprises water.

14. The method of claim 12 , wherein the coating comprises an oleophilic coating and the second fluid comprises an oil.

15. The method of claim 12 , wherein the first fluid is deposited using a vapor deposition process.

16. The method of claim 12 , wherein the second fluid is deposited by immersing and removing the substrate in a bath of second fluid.

17. The method of claim 12 , further comprising:
determining that the component not aligned with the alignment area, and in response, agitating the substrate.

18. The method of claim 12 , further comprising removing the first fluid after determining that the component is in contact with the alignment area.

19. A method of positioning a component on a surface of a substrate, the method comprising:
applying a coating to the surface to define a grid pattern around a periphery of a target alignment area, the grid pattern comprising:
a first deposit area adjacent to the first portion of the periphery;
a second deposit area adjacent to a second portion of the periphery; and
a third deposit area adjacent to a third portion of the periphery;

defining an alignment guide over the target alignment area by forming a first volume of fluid on the first deposit area, a second volume of fluid on the second deposit area, and a third volume of fluid on the third deposit area, the alignment guide defined by the space separating the first, second, and third volumes of fluid;
positioning the component over the alignment guide; and
agitating the substrate until the component is in contact with the target alignment area.

20. The method of claim 19 , wherein the component has a tapered shaped.

21. the method of claim 19 , wherein the component is a light emitting diode.

Assignees

• Apple Inc

Inventors

• Prest Christopher D
• Harley Jonah A
• Lynch Stephen B
• Zadesky Stephen P

Classifications

• H05K2201/10106

  Light emitting diode [LED] · CPC title

• H05K2203/167

  Using mechanical means for positioning, alignment or registration, e.g. using rod-in-hole alignment · CPC title

• H05K3/303 Primary

  with surface mounted components (H05K3/32 takes precedence) · CPC title

• H05K2203/1173

  Differences in wettability, e.g. hydrophilic or hydrophobic areas · CPC title

• H05K2203/122

  Organic non-polymeric compounds, e.g. oil, wax or thiol · CPC title