Fingerprint Inspection Method for Metal Dome

In the manufacturing process of metal dome, the metal dome will be inevitably touched by fingers. The fingerprint and grease left will accelerate oxidation of metal dome and reduce its life. Then the quality of the metal dome getting lower is followed. Therefore, the quality inspection of the metal dome is one of the important parts to enhance the product competition.

Nowadays, the visual inspection is used by a majority companies, but it is inefficient and easy to misjudge. In order to improve the production efficiency, so a sort of method based on machine vision for fingerprint inspection of metal dome was proposed.

The method uses Generalized Hough Transform to locate the target, extracting the Gray-level Co-occurrence Matrix of targets and supporting Vector Machine classification, which realizes the automatic inspection of the quality of the metal dome. Most of the experimental results show that the method has achieved good effect and got practical and promotional value in a certain.

Since established in 2006, Best Technology always tries its best to use the most advanced technology to inspect the metal dome, to be customers’ best partners of metal dome and metal dome array with high quality.

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What Will Cause the Metal Dome Can’t Rebound?

The reason why the metal dome is pressed but do not rebound maybe related to the operational environment as well as the using habits of the operators. The metal dome must be used in a flat surface. It is a very long stroke if the metal dome is pressed on a concave surface, which is easy to cause anti-concave of the metal dome. And pressing the metal dome with a strong force will also cause anti-concave of it.

In addition to the above reasons, there is still another one: the metal dome has deformed.

As known to us, the metal dome will be deformed by the external force. There are several possibility will cause like that:

  1. The material is squeezed during transportation.
  2. The metal dome is stuck by the jig.
  3. Tweezers are used in the manufacturing process.

Now we have already know the reasons, but how to prevent? Details as below:

Preventive measures

  1. Using foam to wrap a few laps when the material is packed, then put it into the carton,sticking a fragile tag and ask the courier to take it carefully during transportation.
  2. Using tweezers to pick out the metal dome that is stuck by the jig.The metal dome should not be reused if it is stuck in the jig.
  3. In order to prevent the metal dome from deformation, using tweezersto clamp the metal dome should be lightly in the manufacturing process.

If you also would like to know further information of click feeling about metal dome, click here to read How to Calculate the Click Feeling of Metal Dome?

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Meeting Customers from Vietnam–First Stop at the Office

On October 18, 2018, Customers Son and Nguyen from Vietnam visited Best Technology. They are very interested in our metal dome and Flex PCB. For the first stop, they came to our office and there were a warm welcome for them. To begin with, our salesman Connie and Celine introduce the information about metal dome and FPC to them. During the conversation, in order to provide the most suitable products and the most service for customers, we have also learned their requirements.

Connie is introducing metal dome

picture1: Connie is introducing metal dome

In order to let the customers know Best Technology well and build a good sense of trust, we showed the culture and strength of our company. A video was played to let them learn more about our company’s product manufacturing capability and history.

Customers are watching the video

picture2: Customers are watching the video

After the meeting, we invited the customers to sign their name on the company cultural wall and took a photo with us.

Taking a photo

Ppicture3: Taking a photo

Since the customers know more about our strength and culture, so they would like to visit our factory. For more details about the second stop, continue to read:

Meeting Customers from Vietnam–Second Stop at the Flex PCB Factory

Posted in Circle metal dome, Four leg metal dome, metal dome array, Metal Dome Assembly | Leave a comment

National Day Holiday Notice

The National Day is around the corner, and everyone will back home or go out for travelling. As usual, the factory of Best Technology will be closed from October 1st, 2018 to October 3rd, 2018. And we will back to work on October 4th, 2018. Therefore, please go ahead or postpone your orders if you have any plans for fabrication. During the holiday, please feel free to contact us at +86-755-2909-1601, or with any questions.

We wish you and your family have a wonderful holiday and we thank you for your continued supporting.

Respectfully Yours,

All the members of Best

Best, always be your best choice of metal dome and dome array in China.

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The Click Feeling and the Life of Metal Dome

In a certain force, what will change if the click feeling of metal dome gets greater? Yes, the return force will get smaller, the stroke of the metal dome needing higher, the height getting higher and the life getting shorter. So the click feeling should be controlled between 50% and 65% in the process of production. In this way, not only can ensure the good click feeling of the metal dome, but also can prolong its life.

Besides, the life of metal dome is also related to its height, thickness, process flow and the experience of the designers. In general, the thickness and the stroke is higher if the height of metal dome is higher. And meanwhile, the life of it will shorten.

BEST, always be your best choice of metal dome and dome array in China.

Posted in Circle metal dome, Four leg metal dome, metal dome array, metal dome related, Metal Domes | Leave a comment

Good to Know Something about the Air Vent on Metal Dome

Most customers will ignore the air vent on the metal dome when they plan to design the metal dome array. Actually, whether it is single key, or multiple key, we will add the air vent on the original drawings of the customers when making samples. As the name implied, the mainly function of the air vent is to release the “air” from the dimples of the metal dome when pressing the metal dome. Besides, adding the air vent is to make the feeling get better when touch.

If there is no air vent, there will be a certain chance that the metal dome not come up when pressing. Of course, the single key dome array may not have an air vent when the diameter is large and the height is relatively high.

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Welcome Back, Welcome Rooster Year 2017!

Welcome back everybody! Welcome back to work to make your dream, to make our dreams come true! After the longest holiday (15 days), our company resumed on Feb 5! (The ninth day of first month of Chinese Lunar Calendar)

In the morning, more than 25 minutes before normal working time beginning, our girls already arrived at the office, so excited that can’t wait for boss to open the door^_^. Boss give the lucky money in red packet to everyone come to office in the first day, even the people deliver the parcel, guard whom just said “Good luck in 2017” (Gong Xi Fa Cai!). We believe that will bring lucky to people giving and receiving.










Both boys and girls were happy to see each other after 2 weeks Spring Festival and asked for questions such as “how are you?” “how did you spend Spring Festival?” even “Did you date?”.

In the afternoon went to Phoenix Mountain Forest for hiking. This is a traditional activity on the first working day after New Year vacation in our company. We can talk to each other under the open air, everybody shared their stories and we always laugh when heard something interested happened during holiday.

Best Technology Team in Phoenix Mountain Forest on Feb 5 2017

Best Technology Team in Phoenix Mountain Forest on Feb 5 2017









After around half hour, we arrived the top of Mountain and everyone feel satisfactory because they made it, the first goal in the new year come true!

Happy Flgman

Happy Flgman











Happy Girls on the mountain

Happy Girls on the mountain











We believe after such long vacation, all of our team members were fresh with energy and are ready to provide best service and suitable products to our customers. Looking forward to hearing more news from our customers, partners, friends and family, as well as looking for new people to join our team to make their dreams come true!

Company Vision

Company Vision











Team Member on the top of Mountain

Team Member on the top of Mountain













If any inquiry for Metal Dome, whatever it is Circle (Round), Four-leg (Cross), Triangle, Oblong, or customized shape dome; Packed in bulk (PE bag), in Tube, or in Tape & reel; or metal dome array (single layer, double layer, rubber glue, EMI, LGF; Single key dome array or plunger (actuator) dome array, welcome to contact us. You will see how Best Technology can save your time and money!

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How to test the life of metal dome?

I often receive this question “ what’s the life of this metal dome? We require 1million times?” from customers, it’s very easy to tell you the answer, but I think you maybe want to know how to test and get the result.

Hereby I will tell you how to test the life of metal dome, but firstly, I should let you know, we don’t have a unified test method in the market. And right now, a lot of people use ASTM F15780-07: Contact closure cycling generally testing conditions. And the standard we used was more higher in most of areas.

1) Testing probe: Often use rubber probe & tungsten steel probe, probe size from 1.5 mm to 3.0 mm or more bigger, normally it’s 30% of diameter of metal dome.

metal dome test probe

metal dome test probe

2) Test force: We use two times active force of metal dome, but in USA and EU, most of customers only use 1.1 times, so our testing force is higher, so that the final life cycle result will be smaller than others, but that also means customer can get a more longer life cycles if using their own standard.

metal dome testing force

metal dome testing force

3) Test Frequency: 2-3 times per second (120 times -180 times per minutes), 72,000~10,800 times/hour.

metal dome life test speed and time data

metal dome life test speed and time data

Before testing, should pre-press the dome 5-10 times, then put this dome under the test probe, set the test condition and begin life testing, until metal dome broken.

We will record various parameters of metal dome after each 100,000 times testing. (normally take 10 hours to go through 100,000 times). These parameters will includes:

CP: Compression Peak Force;

CL: Compression Low Force;

RL: Release Low Force;

RP: Compression Peak Force

CC: Click Feeling:

(CC(%)=(CP-CL)/CP x 100%, it is normally between 35% and 60%.)

Travel (stroke):


metal dome force test report

metal dome force test report

For other parameters, please refer to another article:

It will take 4-5 days to finish this metal dome life cycle testing, if your target was 1 million times. And for some metal domes, life cycles can be 2M or 3M times. And we are also developing new metal dome to achieve 5M and 10M times.

metal dome life test report

metal dome life test report

Also if your testing condition was different from us, the final result will be different. As mentioned above, most of customers in USA or EU will have longer life cycles than us, because different testing probe, force, or frequency. So maybe you can tell us what your testing parameters are so that we can simulate your metal dome life cycle testing condition to get a more closed result as yours.

Now are you clear how to test the life of metal dome? Below photo is the life testing machine. (metal dome life tester)

metal dome life tester

metal dome life tester

Best Technology Co., Ltd is the leading manufacturer of metal dome & dome array for more than ten years, please feel free to contact us, we will solve your questions. We are here, always with you.

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Customer Andrea And Alessandra From Italy Visit Our Company

On Oct 26th , our customer Andrea and Alessandra from Italy visited our company. This is the first time we met since they became our customer in July. They are so nice and kind, and we don’t need to take long time to be familiar with each other.

Andrea and Alessandra visited our metal dome factory, to see whole metal dome manufacturing process, from raw material (stainless steel foil) loading and feeding, metal dome punching, collection, initial testing force, ultrasonic cleaning, inspection (FQC), life testing and packing, as well as warehouse, metal dome tooling repairing room. You see it’s very simple procedure, right?

Raw material Loading, feeding and punching

Raw material Loading feeding and punching

Raw material Loading feeding and punching









Life test of metal dome

metal dome life testing

metal dome life testing

After visited the process line of metal dome, they were very happy and spoke highly to us. Later, we discussed order details, such price, shipping method, etc and the possibly to develop a new shape & function of metal dome which will always keep in contacting status. We have more confidence in our future cooperation after this meeting.

Andrea and Alessandra, so glad to see you this time, looking forward to seeing you soon next year.

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Happy Cambodia Vacation 2016!

From Aug 18th to Aug 23rd, some team member from Best Technology was in Cambodia for annual vacation.

They visited Phnom Penh and Siem Reap, saw the Angkor Wat, Bakong, Phnom Bakheng, Banteay Srei and a lot of other famous sites in Cambodia.

BEST Team in Angkor Wat

BEST Team in Angkor Wat





















After enjoyed the beautiful sculpture built during 802-1432, our team believe nothing can be lasted forever but excellent creation, and nothing is impossible if you insist on that and keep on doing.

BEST team in village of Cambodia

BEST team in village of Cambodia










Now is full of fresh energy back to office, will continue to provide best service, excellent products to our customers. Please contact us today if any inquiry for metal dome, or metal dome array or any other special metal dome arrays.

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