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Aluminum Base PCB

Aluminum Base PCB

Aluminum base PCB 1.company information Uniwell circuits is one of the competitive factories in PCB manufacturing in China.It is located in Shenzhen and it was found in 2007. Uniwell professional in Flex PCB & Rigid PCB prototyping, PCB manufacturing, and PCB assembling, and stencil. We have...

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Aluminum base PCB


1.Product describe

7_副本.jpg


Specification

♦ Layer: 1 layer    
♦ Material: Aluminum 
♦ Mini Hole: 0.2mm  
♦ Testing point: 1000  
♦ Solder mask: LPI White 
♦ Function: LED

♦ Thickness: 1.6mm 
♦ Copper thickness: 35um 
♦ Mini Width/space: 4mil/4mil
♦ Finish treatment: HASL
♦ Silkscreen: Black


We have thousands of design for MC PCBs. 
We are one stop solution for your requirements in LED lights. 
We deal with all LED lights accessories like Fixtures / Drivers / LEDs / Solar panels / Battery / Solar Inverters for Spot Lights, Down Lights, Flood Lights, Bulbs, Tube Lights, Solar Street Lights etc


2.Company information  

Uniwell circuits is one of the competitive factories in PCB manufacturing in China.It is located in Shenzhen and it was found in 2007.


Uniwell professional in Flex PCB & Rigid PCB prototyping, PCB manufacturing, and PCB assembling, and stencil. We have state-of-the-art PCB manufacturing equipment, complimented by the latest inspection equipment for manufacturing close-tolerance boards up to 32 layers.


We are proud to have capability to provide copper thicknesses up to 10 oz, hidden or blind vias, high frequency, aluminum based and customer specified PCBs. All of our PCB board products are in compliance with UL and GB (China National Standard Committee) and IPC-600E standards.

图片86_副本.jpgQQ图片20180524142208.jpg




3.Aluminum PCB applications

Aluminum-backed PCBs are used more than ever for applications of high power/high thermal heat dissipation.  Although they were originally designed for high power switching supply applications, aluminum-backed printed circuit boards have gained popularity in LED applications, including traffic lights, automotive lighting and general lighting. The use aluminum designs allow the density of LEDs in the PCB design to be higher and for the mounted LEDs to operate at higher currents while staying within specified temperature tolerances.


Other applications for aluminum PCBs include power supplies, high-current circuitry, motor controllers and automotive applications. Aluminum core PCB materials are very effective in thermal heat dissipation applications that involve high-power surface mount integrated circuits. Because of the high level of thermal dissipation associated with aluminum-backed PCBs, circuit board designs can be simplified. Aluminum PCBs eliminate forced air and heat sinking, which ultimately lowers the design cost. Just about any design than can be made better by improving thermal conduction and temperature control is a candidate for an aluminum-backed PCB.


图片121_副本.jpg


4.Technology road map 

Since established, Uniwell Circuits has built up a powerful R & D team to enhance its technology capability.
P: Prototype         SV: Small Volume            M: Mass production



ITEM

2015

2016

2017

2018

2019

Layers

32layer

P

P

SV

SV

SV

36layer

 

P

P 

P

P

42layer

 

 

P 

P

P

Min. Line width/space

Inner Layer

3/3mil

M  

 

 

 

 

2.5/2.5mil

P

SV

SV

M

 

2/2mil

 

 

P 

P

P

Outer Layer

3/3mil

SV

SV

M

 

 

2.5/2.5mil

 

P

SV

M

 

2/2mil

 

 

P 

P

P

Min. mechanical drilling hole size

8mil

M  

 

 

 

 

6mil

P

P

SV

SV

SV

Aspect Ratio

13:1

SV 

SV

M

 

 

15:1

 

P 

SV

SV

SV

16:1

 

 

P 

SV

SV

18:1

 

 

 

P

P

Copper thickness

6 OZ

P

SV

M

 

 

8 OZ

P

P

SV

M

 

10 OZ

 

P

SV

M

 

12OZ

 

 

P 

SV

SV

finished asymmetric copper foil 1/6OZ

P

SV

M

 

 




ITEM

2015

2016

2017

2018

2019

Impedance control

±10%

M

 

 

 

 

±8%

P

P

SV

SV

SV

±5%

 

P

P 

SV

SV

Finished board thickness

Thick

6.5mm

P

SV

M

 

 

7.5mm

P

P

SV

SV

SV

10mm

P

P

P 

P

P

Thin

0.15mm

SV

SV

SV

SV

SV

0.1mm

 

P

P 

SV

SV

Max. finished board size

Length

1200mm

P

P

SV

SV

SV

Width

650mm

P

P

P 

SV

SV

Min. Inner layer clearance

4layers

0.075mm

 

p

P 

p

p

8layers

0.1mm

 

p

P 

p

p

12layers

0.125mm

 

p

P 

p

p



ITEM

2015

2016

2017

2018

2019

Special Technics

Buried capacitor/resistor

 

P

P 

SV

SV

Rigid-flexible board

 

P

SV

SV

SV

Counterbore +Blind buried VIA S(HDI)

P

P

SV

SV

SV

2-layer and multilayer Aluminum based PCB

P

SV

SV

M

 

Metal core and PTFE material combined PCB

P

P

SV

SV

SV

Hybrid pressing (Ceramic core+FR4+Cu core)

 

P

SV

SV

SV

Multi-layer PTFE

 

 

P 

P

P

Partial Hybrid pressing(FR4+Ceramic)

P

P

SV

SV

SV

Partial Bulgy Solder PAD Technics

P

P

SV

SV

SV

Selective Surface Finish

P

SV

SV

SV

SV

Half Hole/Half Slot Technics

M  

 

 

 

 

Intersect mechanical Blind Via (hole diameter no less than 0.15mm)

 

p

P 

p

p

Back Drilling Technics

P

SV

SV

SV

SV

Via in PAD

M

 

 

 

 

V-CUT go through PTH

P

SV

M

 

 

Abnormal Slot/Hole Technics( Countersink, Half Hole, Screw hole, Control Depth Hole, Counterbore, Board Edge Plating)

SV

M

 

 

 

Multiple-Pressing(No larger than 4 times)

SV

SV

SV

SV

SV


5.RoHS compliant PCBs

RoHS, or the restriction of hazardous substances, focuses on six specific materials that should no longer be used, or should have limited use in printed circuit boards:

● Lead

● Mercury

● Cadmium

● Hexavalent chromium

● Polybrominated biphenyls

● Polybrominated diphenylether


While many of us will recognize those first few elements, it’s worth noting that the final two items on that list are plastic-specific fire retardants. It also covers four different phthalates.

Use amounts per product are governed by a max concentration amount, typically calculated by the weight of homogenous material in your PCBs.


Importance of RoHS

RoHS-compliant circuit boards are important because the products that use these PCBs will one day likely end up in a landfill or other trash reclamation process. RoHS PCBs remove many of the hazardous chemicals that pollute our landfills. They also protect the people who put together your circuit board. 


Uniwell is one of the leading lead-free printed circuit board manufacturers in China, and we adhere to other RoHS compliance requirements to reduce any occupational exposure to workers during manufacturing as well as recycling.


RoHS Restricted Materials

Banned Substance

RoHS LIMIT: MCV* PPM

Lead (Pb)

1000

Mercury (Hg)

1000

Cadmium (Cd)

100

Hexavalent Chromium (Cr+6)

1000

Polybrominated Biphenyl (PBB)

1000

Polybrominated Diphenyl Ether (PBDE)

1000


Identification

An important part of being an RoHS-compliant printed circuit board manufacturer is to properly identify the PCBs and other materials that adhere to these standards. With any RoHS PCBs, we prefer to provide you with a wide variety of documentation so you know the materials you are using are proper and safe.

For RoHS-compliant circuit boards, this will include the RoHS Certification of Conformance with each shipment, and the packaging on all appropriate items will provide a RoHS/Pb-Free designations.


Compliant surface finishes and materials

Uniwell provides RoHS and lead-free circuit boards with a variety of finishes that maintain compliance. Our surface finish alternatives allow you to maintain compliance and stay safe. Some of the finishes available to you include:


Surface Finishes

Shelf Life

Co-Planarity

ENIG

12 Months

Yes

Immersion Silver

6-9 Months

Yes

Immersion Tin

3 Months

Yes

Lead Free HASL

12 Months

Moderate

OSP

6-12 Months

Yes


Substrate materials include a variety of Isola, Plyclad Rogers, Getek and Nelco products, for varied electrical performances and loss rates. Most RoHS-compliant PCBs can use multiple options from each of these lists.


Why Uniwell?

Printed circuit boards that are RoHS-complaint matter deeply to Uniwell. We’ve been providing industry-leading safety and compliance for more than 10 years, and we want to ensure that every product we deliver to you is safe. Compliance is a chief concern of ours, and is offered with all of our products — along with a free assessment of your needs and award-wining customer service. Learn more. 


Our commitment is to be a lead-free printed circuit board manufacturer for China and international clients. We have a pledge to our staff, our communities and our world that RoHS compliance is important and should always govern the work we do.

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