PCBgogo

Electronic Project Engineer's Best Partner!
z****gyu
An Introduction to Aluminum PCBs by PCBGOGO
212838 63 Oct 09.2018, 18:25:34

Aluminum PCBs are printed Circuit Boards which contain a thin layer of conductive dielectric material. They are also known as Aluminum Clad, Aluminum base, MCPCB (Metal Clad Printed Circuit Board), IMS (Insulated Metal Substrate), Thermally Conductive PCBs etc. Aluminum PCBs were developed in the 1970s, soon after which they’re applications increased dramatically. The first application was their use in Amplification Hybrid Integrated Circuits. Now they are being used at a large scale due to which it is necessary for us to have an idea of Aluminum PCBs and their importance.


Structure of Aluminum PCBs:

Aluminum PCBs are aluminum based CCLs (CCL is a type of base material of PCBs). AluminumPCBs are actually quite similar to FR4 PCBs. The basic structure of Aluminum PCBs is four layered. It consists of a layer of copper foil, a dielectric layer, an aluminum base layer and aluminum base membrane.


  • Copper Foil Layer: the copper layer used is relatively thicker than normal CCLs ( 1oz-10oz). A thicker layer of copper means a larger current carrying capacity.
  • Dielectric Layer:the Dielectric layer is a thermally conductive layer and is around 50μm to 200μm thick. It had a low thermal resistance and it suitable for its application.
  • Aluminum Base: The third layer isthe aluminum base which is made up of aluminum substrate. It has a high thermal conductivity.
  • Aluminum Base Membrane Layer: Aluminum base membrane is selective. It has a protective role by keeping the aluminum surface safe from scraping and unwanted etching. It is of two types i.e. Lower than 120 degree or around 250 degrees (anti high temperature)


Performance of Aluminum PCBs:


  • Thermal Dissipation:the performance of aluminum PCBs while dissipating heat is quite well as compared to ordinary FR4 PCBs. For example, a FR4 PCB that is 1.5mm thick will have thermal resistance of 20-22 degrees per watt whiles a aluminum PCB 1. 5mm thick will have a thermal resistance of 1-2 degrees per watt.
  • Thermal Expansion: each substance has its own coefficient of thermal expansion. The CTE of aluminum (22ppm/C) and copper(18ppm/C)is quite close. Since aluminum PCBs work well in terms of Thermal dissipation they do not have severe expansion or contraction issues. They work excellently and are durable and reliable.




  • Dimensional Stability: aluminum PCBs show dimensional stability and stable size. For example, when they are heated from 30-140 degrees, their size only had a change by 2.5%-3.0%.
  • Others: Aluminum PCBs can be used in power device surface mount technology. They are effective for use in circuit design because of their performance in terms of thermal expansion of circuit design. They help to prolong products shelf life and product power density. They are also extremely reliable. They can help to shrink the overall volume of the product and is also a cheaper option. They show electromagnetic shielding and high dielectric strength.



Classification of Aluminum PCBs: Aluminum PCBs are essentially divided into three categories.


1: Universal Aluminum PCB: the dielectric layer used here is made up of epoxy glass fiber pre-preg.

2: High Thermal-Conductive Aluminum PCB:the dielectric layer is made up of epoxy resin. The resin used must have high thermal conductivity.

3: High-frequency Aluminum PCB:the dielectric layer is composed of polyolefin or polyimide resin glass fiber pre-preg.


Manufacturing Difficulties of Aluminum PCBs:

The manufacturing process for nearly all aluminum PCBs is essentially the same. Here we will discuss the major manufacturing processes, the difficulties and their solutions.


Copper Etching: the copper foil used in Aluminum PCBs is comparatively thicker. If the copper foil is over 3oz however, the etching requires width compensation. If it is not according to the demand of the design, the trace width will be out of tolerance after etching. Therefore the trace width compensation should be designed accurately. The etching factors need to be controlled during manufacturing process.




Solder Mask Printing: due to the thick copper foil there is a difficulty in solder mask printing of aluminum PCB. This is because if the trace copper is too thick then the image etched will have a large difference between trace surface and base board and solder mask printing will be difficult. Therefore, the two-time solder mask printing is used. The solder mask oil used should be of good quality and in some cases the resin filling is done first and then solder mask.


Mechanical Manufacturing: the mechanical manufacturing process involves mechanical drilling, molding and v-scoring etc. which Is left on internal via. This tends to reduce electrical strength. Therefore, the electric milling and professional milling cutter should be utilized for low-volume manufacturing of products. The drilling parameters should be adjusted to prevent burr from generating. This will help your mechanical manufacturing.


PCBGOGO, the leading PCB board and PCBA manufacturer in China, offers PCB and Assembly services at low price.


PCBGOGO highly specialized not only in quick-turn PCB prototype and PCB assembly, but also small and medium volume PCB fabrication. We have three factories, established over 17,000 M2, which are fully compliant with the standard of ISO 9001:2015 Quality Management System. All the PCB boards and assembled PCBs are high quality and certificated with UL, REACH, RoHS and CE. These boards are custom designed according to your needs. Just looking at the “product categories” PCBgogo specializes in, we realize how much they have expanded over the years. These categories include data communication, optical networking, medical treatment, industrial control, aerospace/military etc. just to name a few. 


Get Instant Aluminum PCB Quote


  • Comments(63)
Upload a photo:You can only upload 1 files in total. Each file cannot exceed 2MB.Supports JPG, JPEG, GIF, PNG, BMP
Browse
Submit
header
W****ori

Nov 22.2024, 18:22:22

Feel the excitement just like playing in the Las Vegas! panaloko

Reply

Submit
header
W****ori

Nov 22.2024, 13:32:01

Enjoy exclusive RebirthRO headgear and Zeny farming opportunities that you won't find anywhere else. rebirthro server

Reply

Submit
header
W****ori

Nov 20.2024, 13:11:45

Reply

Submit
header
W****ori

Nov 19.2024, 01:44:28

Dive Into Our Handpicked Range Of Specially Crafted Pre-rolls, Designed To Catapult Your Cannabis Journey To Stellar New Heights.  bymyweedonline

Reply

Submit
header
W****ori

Nov 18.2024, 14:00:21

PANEN4D adalah platform togel online yang menawarkan pengalaman bermain yang aman dan terpercaya. panen4d

Reply

Submit
header
W****ori

Nov 17.2024, 13:47:50

No matter what method is used, it must be supported by a set of theories and philosophies in order to have depth. gold99

Reply

Submit
header
W****ori

Nov 16.2024, 14:30:16

The long list includes online slots, online poker, online baccarat, online roulette, and sports betting, among others. OKbet

Reply

Submit
header
W****ori

Nov 16.2024, 03:05:49

滿貫大亨官方網站推出多元活動讓您玩不完!快來滿貫大亨拿好禮!巨大機器人登場!機甲充能,好禮送不停!滿貫大亨序號

Reply

Submit
header
q****ist

Nov 11.2024, 00:54:55

It is very good, but look at the information at this address.  



<a href="https://questmist.com/angel-numbers/411-meaning-love-career">understand Meaning of Angel Number 411</a>


Reply

Submit
header
q****ist

Nov 11.2024, 00:55:40

[URL="https://questmist.com/dream-symbols"]dream symbols meaning[/URL]

header
W****ori

Nov 06.2024, 19:31:08

涵蓋全球最受矚目的體育賽事,每個月超過10,000場比賽等你來下注,從英超到NBA,讓你盡情感受體育的熱血與刺激!oc娛樂城

Reply

Submit
header
W****ori

Nov 05.2024, 15:10:35

Reply

Submit
header
W****ori

Nov 05.2024, 15:09:54

??, ??? ???? ??? ?? ??? ??? ?? ??? ?? ??? ?? ?? ???? ? ?? ??? ??? ??? ?????.  ??????

Reply

Submit
header
W****ori

Nov 04.2024, 02:40:15

real-bearded Santa Clauses and your favorite green monster – the Grinch.  Christmas santa frisco Texas

 

Reply

Submit
header
A****ket

Nov 03.2024, 12:55:04

Great article, <a href="https://www.spendelonmuskmoney.org/">Spend Elon Musk Money</a>

Reply

Submit
header
A****ket

Nov 03.2024, 12:53:06

https://www.spendelonmuskmoney.org/

Reply

Submit
header
W****ori

Nov 03.2024, 02:54:23

Anda bisa memainkan dan mengambil taruhan secara optimal bersama situs judi online terpercaya ini. https://linkbolaaman.com/

 

 

Reply

Submit
header
W****ori

Nov 01.2024, 14:19:57

It is incredible to get along with such a beautiful female sex robot, she is good at talking, learning all the human customs, to better understand us and help us solve problems.  Sex Robot

Reply

Submit
header
W****ori

Nov 01.2024, 02:39:54

Ada beberapa faktor yang perlu dipertimbangkan sebelum memutuskan untuk mencobanya.  Suara 4d

Reply

Submit
header
W****ori

Oct 31.2024, 20:12:17

Situs Suara 4d ialah platform bo togel terpercaya dan terbaik se-Indonesia. Slot Suara4d

Reply

Submit
header
W****ori

Oct 28.2024, 16:56:41

Try MyFriv for an exciting and enjoyable gaming experience today! myfriv

Reply

Submit
header
W****ori

Oct 27.2024, 15:19:24

Kontributor Mikrobiologi adalah master-master (S2) bidang Biologi dan Mikrobiologi dari berbagai universitas terkemuka. https://mikrobio.id/linktoto

Reply

Submit
header
W****ori

Oct 25.2024, 13:59:09

menawarkan berbagai pilihan permainan menarik dan menghibur. salah satu tren terbaru adalah munculnya situs slot raffi yang unik dan mengasyikkan. Slot Raffi Ahmad 88

Reply

Submit
header
W****ori

Oct 23.2024, 15:08:25

??? ?????? ?? ? ?? ? ???????. ?????? ?? ?? ??????? ????? ??? ????? ??? ??? ??? ??????. ??????

Reply

Submit
header
W****ori

Oct 20.2024, 21:31:44

Situs Raffi 77 777, Slot Raffi ahmad dan Link Slot Raffi 77. filmooj.com

Reply

Submit
header
W****ori

Oct 20.2024, 14:07:15

Bener itu merupakan tempatnya para permain togel 4d yang bisa memilih semua pasaran yang dimainkan.  KARGOTOTO

Reply

Submit
header
W****ori

Oct 19.2024, 13:41:53

Laser cladding is an advanced surface modification technique that offers several advantages for improving the properties and performance of metal components. Straightening Solutions

Reply

Submit
header
W****ori

Oct 17.2024, 19:01:27

Ketika Anda mendapatkan tiga atau lebih simbol Scatter, biasanya ini akan memicu putaran bonus atau fitur khusus lainnya dalam permainan slot. shalemarsharbatly.com

Reply

Submit
header
W****ori

Oct 16.2024, 14:11:11

Improve your workflow with our top-rated CM to conversion tool today. cm to mm

Reply

Submit
header
C****Wei

Oct 15.2024, 16:02:49

http://www.youtube.com/ , <a href="http://www.youtube.com/"> Youtube</a> , [url=https://youtube.com]Youtube[/url] , [Youtube](https://youtube.com)

Reply

Submit
header
**

Oct 10.2024, 19:41:43

It is very good, but look at the information at this address.  Long Island CPA firm

Reply

Submit
header
m****ohn

Oct 10.2024, 06:55:58

Embark on an exhilarating journey with Low's Adventures 3 a captivating 2D pixel art platformer that elevates the franchise to new heights! Featuring 32 …

Reply

Submit
header
m****ohn

Oct 10.2024, 06:52:47

[house of hazards](https://houseofhazardsgame.com) is a challenging skill game with multiple missions. Compete with other players to do your housework and take caution with dangers.

Reply

Submit
header
m****ohn

Oct 10.2024, 06:51:50

[url=https://houseofhazardsgame.com]House of Hazards[/url] is a challenging skill game with multiple missions. Compete with other players to do your housework and take caution with dangers.

Reply

Submit
header
W****ori

Oct 10.2024, 01:00:24

Get enterprise-grade solutions that offer the best value in the industry, letting you enjoy more features and services for less. cloud server pricing

Reply

Submit
header
W****ori

Oct 01.2024, 18:55:53

Reply

Submit
header
W****ori

Oct 01.2024, 18:55:18

24?? ?? ??? ?? ??? ?? ??  ????

Reply

Submit
header
W****ori

Oct 01.2024, 18:55:17

24?? ?? ??? ?? ??? ?? ??  ????

Reply

Submit
header
W****ori

Sep 25.2024, 19:31:20

GB WhatsApp is actually a mod version of WhatsApp. With over 10 updates released each year, GB WhatsApp ensures that users constantly enjoy fresh and innovative functionalities. GB WhatsApp

Reply

Submit
header
W****ori

Sep 14.2024, 02:52:57

 

Situs slot gacor terpercaya adalah platform yang memberikan layanan berkualitas tinggi dengan sistem keamanan yang terjamin. situs slot gacor terpercaya

Reply

Submit
header
W****ori

Sep 07.2024, 14:53:04

????? ???? ???? ??? ???  ??????

Reply

Submit
header
G****ziz

Aug 29.2024, 12:34:22

Join fun games to have a positive energy for a long day at work, this is the classic game that I want to introduce to you, join now. traffic rider

Reply

Submit
header
**

Aug 28.2024, 15:24:14

Aluminum PCBs: Where conductivity meets cool. They don’t just carry current; they carry weight. [Geometry Dash Spam](https://geometrydashspam.com/)

Reply

Submit
header
W****ori

Aug 07.2024, 15:38:53

<a href="https://wooribeting.com/">https://wooribeting.com/</a>

Reply

Submit
header
W****ori

Aug 07.2024, 15:38:27

????? ?? ???? ???? | ???????? – ??? ?????? ???? ????? RA??? ???. ??? ???? ?? ??? ??? ????. [url=https://wooribeting.com/]?????[/url]

Reply

Submit
header
N****ose

Jul 19.2024, 23:20:03

Neal Fun offers a fantastic selection of unblocked games that you can enjoy anywhere, anytime. These games provide a great way to unwind and have fun without restrictions. To explore the range of games available, check out the following link: Neal fun Unblocked

Reply

Submit
header
J****aka

Jul 15.2024, 21:32:17

https://geometrydashwave.org/

Reply

Submit
header
J****aka

Jul 15.2024, 21:31:48

https://sites.google.com/view/taylorswift2048/home

Reply

Submit
header
J****aka

Jul 15.2024, 21:31:09

<a href="https://sites.google.com/view/taylorswift2048/home">taylor swift 2048</a>

Reply

Submit
header
J****aka

Jul 15.2024, 21:29:17

<a target="_new" href="https://neal-fun.org/">nealfun</a>

Reply

Submit
header
J****aka

Jul 15.2024, 21:26:56

Thanks I am looking for that type of info.  [url=https://sites.google.com/view/taylorswift2048/home]taylor swift 2048[/url] 

Reply

Submit
header
J****aka

Jul 15.2024, 21:28:08

[Taylor Swift 2048](https://sites.google.com/view/taylorswift2048/home)

header
N****nny

Jul 13.2024, 00:53:37

Neal Fun is a creative and interactive website featuring a variety of fun and educational projects. From data visualization tools to engaging games, it offers something for everyone. The projects are not only entertaining but also thought-provoking, providing a unique way to explore different topics. Whether you're looking to learn something new or just have some fun, Nealfun is definitely worth a visit. Check it out nealfun

Reply

Submit
header
W****son

Jun 28.2024, 13:02:13

My deepest appreciation goes to you for sharing your unique perspective and shedding light on complex issues. Your eloquence, clarity of thought, and ability to communicate effectively have made a significant impact on Geometry Dash Wave my understanding and have inspired me to delve deeper into the subject matter.

Reply

Submit
header
**

May 23.2024, 11:02:35

candy clicker is an engaging idle clicker game where players aim to produce as much candy as possible by clicking and upgrading. The game offers a fun and addictive gameplay loop, with a wide range of upgrades and achievements to keep players hooked.

Reply

Submit
header
P****han

May 20.2024, 02:45:42

such a very good picture <a href="https://www.khansaprinting.com/">Percetakan Jakarta Timur</a>

Reply

Submit
header
P****han

May 20.2024, 02:46:22

such a very good picture https://www.khansaprinting.com/

header
S****new

Jul 08.2024, 10:15:37

header
P****han

May 20.2024, 02:43:22

gambar yang sangat bagus  <a href="https://www.khansaprinting.com/">Percetakan Jakarta Timur</a> dan  <a href="https://www.t4printz.com/">Percetakan Jakarta< /a>

Reply

Submit
header
**

May 10.2024, 15:13:20

In candy clicker you may earn accomplishments and exclusive benefits for accomplishing goals, hitting benchmarks, and perfecting the craft of making candies. As you go through the game, you'll find rare items, power-ups, and additional candy.

Reply

Submit
header
J****ruz

May 03.2024, 18:20:45

Therefore, the two-time solder mask printing is used.  

dallasdrywallsolutions.com/

Reply

Submit
header
C****ter

May 02.2024, 15:28:55

geometry dash scratch is a fun game which require you control a square on the road.

Reply

Submit
header
K****ey

Jan 23.2024, 11:42:22

It gives a summary of the most typical hand soldering issues with PCBs and how to spend elon musk money prevent them. 

Reply

Submit
header
r****now

Dec 18.2023, 09:05:10

Your work is very good and I appreciate you and hopping for some more informative posts premier cs2 accounts

Reply

Submit
header
e****son

Dec 01.2023, 14:25:42

To play basketball stars unblocked, you will need to create a free account. Once you have logged in, you can select a game mode and start playing.

Reply

Submit
header
K****ey

Oct 27.2023, 09:29:45

I am genuinely thankful to the holder of this web page Retro Bowl College who has shared this wonderful paragraph at at this place

Reply

Submit
Share the Project