# US 2014/0153245 A1 · Metal core printed circuit board as heat sink for leds

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- Number: US 2014/0153245 A1
- Document ID: US20140153245A1
- Status: Published application
- Kind: A1
- Application number: 13/706,303
- Filed: 2012-12-05
- Published: 2014-06-05
- Earliest claimed: 2012-12-05
- Assignees: O P I Products, Inc.
- Applicants: O P I Products, Inc.
- Inventors: Gavril Horvath
- Web page: https://patentgrep.com/patent/US20140153245A1

## CPC

- F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks
- A45D 29/00: Manicuring or pedicuring implements
- A61Q 3/00: Manicure or pedicure preparations
- H05K 1/0203: {Cooling of mounted components (H05K1/0272 takes precedence)}
- H05K 1/0284: {Details of three-dimensional rigid printed circuit boards (H05K1/119 takes precedence; shaping of the substrate H05K3/0014)}
- F26B 3/28: by radiation, e.g. from the sun
- H05K 1/05: Insulated {conductive substrates, e.g. insulated} metal substrate
- H05K 2201/10106: Light emitting diode [LED]
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- A45D: HAIRDRESSING OR SHAVING EQUIPMENT (wigs, toupees or the like A41G3/00, A41G5/00; hairdressers' chairs A47C1/04; hair cutting appliances, razors B26B); EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- F26B: DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM (drying devices for combines A01D41/133; racks for drying fruit or vegetables A01F25/12; drying foodstuffs A23; drying hair A45D20/00; body-drying implements A47K10/00; drying household articles A47L; drying gases or vapours B01D; chemical or physical processes for dewatering or like separating liquids from solids B01D43/00; centrifugal apparatus B04; drying ceramics C04B33/30; drying yarns or fabrics in association with some other form of treatment D06C; drying frames for laundry without heating or positive air circulation, domestic laundry-or spin-driers, wringing or hot pressing laundry D06F; furnaces, kilns, ovens F27)

## Abstract

Power LEDs are implanted in a specially designed printed circuit board (PCB) that is known in the art as a Metal Core Printed Circuit Board (MCPCB). The MCPCB is bended over to so as to have rounded corners having a radius that is not smaller than a determined value depending of the overall thickness of the MCPCB and other factors without any negative effects on the insulating layer and copper traces in the area of bending. In this manner, the surface area of the heat sink used in an LED nail care curing appliance is increased. The MCPCB with installed LEDs with rounded corners thereby follows the natural curvature (based on the shape of a human hand) of the appliance housing, eliminating the need for additional heat sinks or fans to reduce the heat generated by the LEDs.

## Claims

### Claim 1

A fingernail coating curing apparatus comprising:
a) a housing with an opening configured to receive fingers of a human hand;
b) a metal core printed circuit board with a plurality of LEDs mounted thereon;
wherein said metal core printed circuit board includes a bended portion for increasing surface area of said metal core printed circuit board in an area surrounding said mounted LEDs, and said bended portion has a radius which is function of a thickness of an insulating layer and metal layer of said metal core printed circuit board, and a material used as said insulating layer.

### Claim 2 (depends on 1)

The fingernail coating curing apparatus defined by claim 1 wherein said LEDs are mounted facing downward from a top of said housing towards a base of said housing.