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Best Technology Attend 2015 Shenzhen International Marathon

December 7th, 2015

Best Technology team have enrolled 2015 Shenzhen International Marathon and finally some of us lucky enough to get the ticket to attend the Marathon, and finished it successfully!

More important is: They’re happy in joining that huge sport, enjoying the atmosphere. At the same time, they challenged themselves! After joined the Marathon, they spent more time on exercise every week, even sometimes felt very tired after in the evening.

2015 Shenzhen International Marathon

2015 Shenzhen International Marathon

Lily & Peter in 2015 Shenzhen Marathon

Lily & Peter in 2015 Shenzhen Marathon

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Some Best Tech Team members at 2015 Shenzhen Marathon

Some Best Tech Team members at 2015 Shenzhen Marathon

Let’s see the Marathon in 2016 in Dec in Shenzhen. More healthy, more happy!

Company PCB & SMT Video Online Now!

October 25th, 2015

Good news! Our company Video of PCB & SMT was online now!  You can see our team member, facility, production capability (includes FR4 PCB, Metal Core PCB, Ceramic PCB, Flexible Circuit, SMT (PCBA), to see how we continue to improve ourselves, to provide best service to our customers.

Please watch the following video on YouTuBe if you cannot open the above video.

Remember Best Technology will be your best choice of printed circuit board, most reliable partner in China!

Welcome to contact us today for more inquiries of various circuit boards.

Summer Vacation & Dragon Boat Festival

June 16th, 2015

Waaa, we will have a Summer Vacation in Thailand from June 16th to June 22nd and will back to office on June 23 (Tuesday).

 

That’s a good relax for everybody in company. And everyone will have more fresh energy after vacation.

 

Enjoy the working day and thinking of holiday ^_^

 

Also happy Dragon Boat Festival!

What the Maximum Current the Thick Film Ceramic PCB can be Carried?

January 27th, 2015

A lot of customers ask us what the biggest current his circuit can be carried, or how can I got a 6 Amps trace? We believe most of engineer design the thick film ceramic PCB, he will consider that, so we share information bellowing and hope it’ll be helpful for you.

When you try to know current, you also need to know the watts of trace will be, and then need to know the power density of thick film ceramic PCB firstly. The power density for conductor itself should be limited to max 600 Watt/inch2 of conductor surface. And power density for an Al2O3 substrate should be limited to 8 Watts/in2 (for the total of all conductors on top of it).

If you have a Ag conductor line of 0.3inch long, 0.010 inch wide (=30 square (0.3/0.01)), the surface area is 0.3 x 0.01 = 0.003 in2. This means the carrying powder P is limited to 600 (power density) x 0.003 (area) = 1.8 watts.

Assume conductor resistivity is 6mOhm/sq/12.5um (material P/N: ESL9562), the resistance value R = 30 sq x 6mOhm = 0.18 ohm.

Power = I2 x R, or I2 =Power/R=1.8/0.18 = 10, so the carrying current limit I = 3.16 amps. Or in a short equation,

I (amps) = line width (inch) x (power density)1/2 / (sheet resistance, ohm) 1/2

  1. If the trace keep 0.3 inch long, but change width to 0.02inch, (=15 square (0.3/0.02), the surface area is 0.3 x 0.02 = 0.006 in2. This means the carrying powder P is limited to 600 (power density) x 0.006 (area) = 6 watts.
    And resistance value for that trace will be 15 square x 6mOhm = 0.09 ohm, and then 3.6/0.09= 40, I=6.325 amps.
  2. If the trace width keep 0.01inch, but change line to 0.6 inch long (=60 square (0.6/0.01), the surface area is 0.6 x 0.01 = 0.006 in2. This means the carrying powder P is the same as 6 watts. (600×0.006).
    But the resistance value for that trace will change to be 60 square x 6mOhm = 0.36 ohm, and then 3.6/0.36= 10, I=3.16 amps. So you can see, it’s no useful to change the trace line.

So if you want to have bigger current for thick film ceramic PCB, then you need to increase the width of trace.

Hope above is clear for everybody. Please leave your comments on that power density of thick film ceramic PCB.

2015 Chinese Spring Festival & Order Deadline

January 20th, 2015

Hello Everybody ,

 

Chinese Lunar New Year (Spring Festival) is coming soon. Thanks for your support in 2014 and always appreciated what you did for us! Looking forward to doing more with you in 2015!

 

Please to be noted that our company will be closed during the following period:

 

Closing Period: Feb 14th to Feb 28th , 2015

Resume on:  March 1st, 2015

As you know, production line before and after our long holiday will be extremely busy, and some worker will still home until Feb 12th, so lead time during this period will be at least 1-2 weeks longer than normal.

In order to avoid any potential delay for products delay, please consider our holiday arrangement and help to release order more early.

Here are deadline for orders which need to be shipped before our holiday:

 

FR4 PCB (without SMT)
1~2 Layer 4 Layer 6-8 layer 10 layer
New Samples 2-Feb-15 31-Jan-15 26-Jan-15 23-Jan-15
Volume production 31-Jan-15 29-Jan-15 27-Jan-15 25-Jan-15
Metal Core PCB (without SMT)
1 Layer 2 layers 4 layers
New Samples 31-Jan-15 26-Jan-15 21-Jan-15
Volume production 30-Jan-15 24-Jan-15 20-Jan-15
Ceramic PCB (without SMT)
1 Layer 2 layers 4 layers
New Samples 23-Jan-15 21-Jan-15 21-Jan-15
Volume production 21-Jan-15 20-Jan-15 20-Jan-15
For repeated order, deadline will be 1 days later.

 

Above lead time is subject to our confirmation after order receiving, as order on production line always increased so much.

 

Regarding SMT and other types of boards, please contact us for lead time.

 

For orders released late than above time, lead time will be postponed in March, 2015

 

We also have limited quick-turn service for 1-4 layers FR4 PCB. Contact us if any requirement.

 

Wish you a happy, healthy and prosperous New Year!

Best Technology always to be your best partner of FR4 PCB, Metal Core PCB, Ceramic PCB , SMT/PCBA in China.

Happy 2015! Happy New Year!

January 4th, 2015

2015 is coming now! Today (Jan 4th) is the first working day in China and of course 1st day working day in Best Technology.

 

When we look back to see what happened 2014, we grow up with the help of our customers, suppliers, friends, employees, step by step.

 

In new 2015, let’s work together, shoulder by shoulder, to achieve a brighter, more prosperous New Year! We can do nothing without you!

 

Always believe, Best Technology will be your long-period, reliable partner in China, for  Metal Core PCB, Ceramic PCB, FR4 PCB, rigid-flex circuits, various special circuit board, SMT Stencil, SMT and PCB Assembly.

Happy-New-Year-2015

Happy-New-Year-2015

Bigger size of Ceramic PCB is Available Now!

December 10th, 2014

Good news! This month we have used a new machine which can print much bigger size of silver palladium, Gold palladium, and glass glaze on Thick Film Ceramic PCB.

Currently the normal dimension in thick film Ceramic PCB is about 80 x 138mm and that size has already limited a lot of designs. You can’t put too much trace, PAD on such smaller size board, and the you have to use 2 layer, or 4 layers ceramic board to put more trace. And of course, that will increase a lot of cost definitely!

Now, we can make 200 x 200mm (8×8 inch). Thinking about the normal 80x138mm and you will find out this is an extreme improving! See bellowing pictures show the comparing!

Ceramic PCB size comparing

Ceramic PCB size comparing

So now you don’t need to worry about the size! You can design as big as you want!

And we are also continuing to adopt first-of-art machine and technology to make bigger size, higher quality Ceramic PCB!

Please contact us if you have more good idea, or suggestion about Ceramic PCB.

 

Why Do I Need to Pay Paypal Fee ?

September 23rd, 2014

It’s very convenient to send money via Paypal, using your debit or credit card, esp. for small amount of money (<=$600), because you can save a lot of time and money will arrive at our account in most of cases (except e-Check). See How to Send and Receive Money via Paypal.

This is why when you order MCPCB, Ceramic PCB, FR4 PCB,SMT/PCBA, or special PCB from us, if amount is small, we suggest to use Paypal.

And an important thing is: usually it’ll be free of charge for you to send money. See what said on Paypal website: https://www.paypal.com/c2/webapps/mpp/paypal-fees

sending payment free

sending payment free

sending payment is usually free, but at the same time, Paypal will charge money on people whom will receive money from Paypal, so that Paypal can earn money.  See how much Paypal will charge on each transferring:

selling fee

selling fee

 

 

 

Of course we have applied discount and only need to pay $3.9+$0.30 per time.

Paypal Fee

Paypal Fee

 

 

 

 

 

 

 

 

 

 

For examples, if you send us $100.00, then Paypal will charge us $100*4% + $0.3=$4.30, and we will receive only $95.70, not $100.

In order to receive full $100.00, buyer should pay $104.37, and Paypal will charge us $4.37 ($104.37*3.9% + $0.3=$4.37), and then we will receive $100.00 ($104.37-$4.37).

In above examples, paypal will deduct 4.37% ($4.37/$100=4.37%) of amount you send. This is why we will ask our customer to pay 4% transferring fee, in order to make calculation more simple.

Normally the cost we quote excludes any transferring fee and need to receive full amount, so we need our customer to support us to pay the Paypal fee.

In fact, even add that fee, it’s still cheaper and more convenient for buyer to pay via Paypal than via bank, if amount is less than $600.00.

If Amount is much bigger, then we will suggest send money via bank as normally wire transferring fee will be about $25-$50 each time.

Any good idea about payment to save time and money, feel free to contact us. Your comments are always welcome!

Simple Solderability Test Experiment

August 23rd, 2014

As is well known, solderability is very important for any type of printed circuit boards, we must do solderability test of each batch PCB we made. In this way we can inspect the weldability of the PCB before we go ahead the assembly process, much helpful for SMT.

In our circuit board manufacturing workshop, we have professional equipment to do that testing. But normally these equipment was expensive, and a lot of people want to know a simple and cheap way to do that solderability testing, so today we are doing a simple solderability test and show you all the steps.

1. Take a small solder pot, plug in the power, turn on the switch and heat the solder pot to a certain high temperature(about 8 minutes).
solder-pot
2. Put a tin bar to the solder pot, then you can see the tin bar is begin to melting, slowly into liquid tin, then more and more.

Tin Bar

Tin Bar

3. After few minutes, there will be enough melting liquid tin in the solder pot to do this test.

melting tin

melting-tin

4.Use a tweezers to pick up a PCB circuit, first clean the PCB with rubbing alcohol. Because the unclear surface or the oxidation of the PCB will affect the test result.Pick-up-the-PCBclean the PCB
5. This is the key step of this test, put the PCB into the solder pot, depth about 2 mm,time 4-5 seconds is ok. Then you can see the tin will go into the hole of the PCB.

Solderability Test 1

Solderability Test 1

Solderability Test 2

Solderability Test 2

6. Take out the PCB from the solder pot and put it into the cold water. After few seconds, you can see the experimental effect.

Test Results

Test Results

This solderability test is very simple and easy. We can see the results very soon. We, Best Technology did solderability of every batch PCB we made, and we also supply our customers with the solderability test report and the test samples.

Any comments about that, leave your message or write email to us. Best Technology, always to be your best partner of circuit boards in China!

Work Resumes after Chinese New Year

February 10th, 2014

Hello Everybody,

After a long time of silence in emailing, we have back to office and resume the work today. With full of enthusiasm, filled with fresh energy, Best Technology team will do better and serve our customer much better in New Year!

During this period, the products lead time will be about 0.5-1 week later than normal condition, but it’ll turn back to normal very quickly.

Thanks for the supporting from everybody and believe we will do much more business together in 2014 and a bright, prosperous New Year!

Best Technology Sales Team