Resin-encapsulated portable media device

Patent metadata

Field	Value
Publication number	US-9442520-B2
Application number	US-201615087901-A
Country	US
Kind code	B2
Filing date	Mar 31, 2016
Priority date	May 2, 2013
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

Portable multimedia devices, and techniques for their manufacture, are provided that feature functional parts embedded with a resin matrix that obviates the need for traditional structural components such as midframes and/or outer casings. The resin matrix may be provided through the use of a flowable liquid resin that is flowed around the functional components within a mold cavity. The liquid resin may then be cured into the resin matrix.

First claim

What is claimed is:

1. A method of manufacturing a portable multi-media touch-screen electronic device, the method comprising:
assembling a touch-screen display module, a power source, a wireless interface, one or more processors, and a printed circuit substrate (PCS) into a device assembly by making electrical connections among at least some of the touch-screen display module, the power source, the wireless interface, and the one or more processors with the PCS, wherein:
the touch-screen display module has a display portion substantially corresponding to a region of the touch-screen display module used to display graphical content and a remaining portion including edges of the touch-screen display module, an electrical interface for receiving power and display module data, and a back surface of the touch-screen display module, and
the printed circuit substrate (PCS) has conductive traces configured to communicate electrical signals among the touch-screen display module, the power source, the wireless interface, and the one or more processors;

flowing a curable resin into the device assembly; and
curing the curable resin into a resin matrix thereby forming a substantially-conformal overall structural component of the device that fixes the touch-screen display module, the power source, the wireless interface, the one or more processors, and the PCS in space relative to each other.

2. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , wherein substantially all free space between the remaining portion of the touch-screen display module, the power source, the wireless interface, the one or more processors, and the PCS is filled with the curable resin and the display portion of the touch-screen display module remains substantially free of the curable resin.

3. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , wherein:
curing the curable resin fixes the touch-screen display module, the power source, the wireless interface, the one or more processors, and the PCS in space relative to each other without requiring a midframe or other separately-manufactured overall structural frame.

4. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , the method further comprising:
placing the device assembly into a mold cavity prior to flowing the curable resin into the device assembly;
flowing the curable resin into the mold cavity, wherein the curable resin is flowed into the device assembly when the curable resin is flowed into the mold cavity; and
drawing a vacuum on the mold cavity to de-gas the curable resin prior to curing.

5. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , the method further comprising:
machining one or more features into the resin matrix after the curing, wherein the one or more features is not comprised solely of engraving.

6. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , the method further comprising:
polishing the resin matrix after the curing.

7. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , the method further comprising:
supporting substantially all of the touch-screen display module, the power source, the wireless interface, the one or more processors, and the PCS by the display portion during flow of the curable resin into the device.

8. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , the method further comprising:
flowing the curable resin into a bezel region of the touch-screen display module around the display portion.

9. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , wherein an additive selected from the group consisting of: hollow microbeads, hollow microspheres, or hollow particulates is distributed within the curable resin.

10. The method of manufacturing a portable multi-media touch-screen electronic device of claim 9 , wherein the additive is added to the curable resin in an amount that results in the density of the portable multi-media touch-screen device, after the resin matrix has been formed, being less than the density of water.

11. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , wherein reinforcement fibers are distributed within the curable resin and the resin matrix is a composite matrix.

12. The method of manufacturing a portable multi-media touch-screen electronic device of claim 11 , wherein the reinforcement fibers have a higher thermal conductivity than the resin matrix.

13. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , further comprising:
placing the device assembly into a mold with a mold cavity having a display module support surface such that a display portion of the touch-screen display module is supported within the mold cavity by the display module support surface.

14. The method of manufacturing a portable multi-media touch-screen electronic device of claim 13 , further comprising:
affixing the touch-screen display module to the display module support surface using a mild adhesive.

15. The method of manufacturing a portable multi-media touch-screen electronic device of claim 13 , further comprising:
sealing the touch-screen display module to the display module support surface to prevent the curable resin from flowing into the display portion of the touch-screen display module.

16. The method of manufacturing a portable multi-media touch-screen electronic device of claim 13 , wherein the mold incorporates a vacuum chuck in the display module support surface and the method further comprises:
drawing a vacuum on a vacuum chuck port of the vacuum chuck to draw the touch-screen display module against the display module support surface before flowing the curable resin into the device assembly.

17. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , further comprising:
adding a coloring agent selected from the group consisting of a dye and a powder to the flowable resin.

18. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , further comprising:
assembling two or more components selected from the group consisting of: the touch-screen display module, the power source, the wireless interface, the one or more processors, and the printed circuit substrate (PCS) to an intermediate supporting structure configured to support the two or more components relative to each other during the flowing of the curable resin and the curing of the curable resin.

19. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , wherein the curable resin has a maximum cure temperature of less than 100° C.

20. The method of manufacturing a portable multi-media touch-screen electronic device of claim 1 , wherein the curable resin is optically clear once cured into the resin matrix.

Assignees

• Amazon Tech Inc

Inventors

• Srinivas Vikram
• Bahmandar Ali-Reza
• Ganapathysubramanian Shankar
• Nachman Ramez
• Tang Patrick

Classifications

• G06F1/1656

  Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories (mounting of accessories to a computer display G06F1/1607; display hoods G06F1/1603; cooling arrangements for portable computers G06F1/203) · CPC title

• G06F1/1643

  the display being associated to a digitizer, e.g. laptops that can be used as penpads (details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615) · CPC title

• G06F1/1626 Primary

  with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs] · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title