Do the different shapes and diameters snap domes can make into one metal dome array?

If you have different feeling requirements or different force requirements for one PCB board, I think you maybe confused that if the different metal domes can be made into one dome array.

The answer is yes, now I am gonna tell you about this.

Different shapes(four-leg,circle,oblong,Triangle without legs), different diameters, different forces, all the metal domes can be designed into one metal dome array, which will save the assembly cost at your side.

However, when we produce the metal with different metal domes, the process is a little bit complicated. We must make different toolings for different metal domes,and it will take more time to assemble, so the price should be higher than other dome array which is with the same force and same diameter.

Now I think you get to know how to design the metal dome array when you have different requiements for one pcb board. Anyway, if you need any help, please donot hesitate to contact with us.

What problems you should pay attention to for LGF (light guide film)?

As we know LGF dome array is a new product for light luminance, so many customers have questions below:

Q. What’s structure of LGF?

A: Material: PC (LGF), Double-sided adhesive (Black and white) and Shading film (Black and white).

Q: How to transfer the light from the guide line to the keypad?

A: There are special marks on the guide light to direct the light up to the key, has many “dots” in LGF to transfer the light to the keypad.

Q: How can I indicate where the LED are?

A: It’s ok to indicate the approximate location of LED. If you don’t have requirements for LED location, we also can help to set the LED location.

Q: What are the critical factors for LGF design and what info should the customer provide to us?

 A: Critical factors: Product structure and location of LED.

Customer should provide thickness of product, character and location of LED to us.

Q: In which case light diffuser is needed?

A: When Legend and LED locations are overlap or other special situation.

Q: Normally how many fine-tuning would be needed during development (from first sample to final samples)?

 A: It’s determined by the schedule of customer end and terminal, base on customer requirements. It will be better if customer can provide samples of their product to us for testing and usually two or three times.

Q: Is there any other important points that customer should pay attention to?

A: Location of LED and Legend.

If you have more questions, don’t hesitate to contact us, meanwhile you can visit for more products about metal domes and metal dome array in our website.

What specifications you need to know when you inquiry for a metal dome array

What specifications you need to know when you inquiry for a metal dome array

Metal dome array is a kind of glued PET array & sheet that carries metal dome, which will be peeled easy from the released paper and place sticky on circuit boards, as a switch of electronic device.If you ask for a metal dome array,what specification do you need to know:

First,the metal dome parameter(detail please see FAQ What specifications you need to know when you inquiry for a metal dome)

Second,metal dome array size ,you should have CAD drawing for your metal array,or your circuit board instead,then we can design for you.

Third,what color do you want,Usually we have transparent and white,black is also available,but its not normal material.(detail please see our blog http://www.metal-domes.com/blog/2011/04/05/metal-dome-array-color/)

How to peel off the dome array?

Do you know how to peel off the dome array from the sheet correctly?

The first way many people think is by hands, but I must tell you please don’t use hands.If you peel off dome array by hands, then you will stain the adhesive on the behind of dome array and have a fingerprint on it, leading to it won’t stick on the printed circuit boards firmly.The right way is to use the forceps or other toolings to peel off the dome array from the release liner, please aslo make sure the circuit boards no stain, dust and dirt.

What specifications you need to know when you inquiry for a metal dome?

Sometimes we get some metal domes inquiries from our customers, but they didn’t give us the specific parameters. I think maybe they also don’t know what the specification is. So we need to confirm with customers again to be clear what the correct metal domes customers need., which will take more time. So this time I will tell you about the specifications of metal domes:

  • First,the metal dome shape: round, four-leg,Triangle, oblong or you need to custom special one for your product. You can choose the different shape metal dome according to your product design.
  • Second, the force, what force is more suitable for your product? 60-500g is most used force for metal dome, also we have higher force, if you need, please contact us for more detail.
  • Third, diameter, Usually diameter 4-12.2 mm is more popular. For more diameter choices, please contact us.
  • Four, the surface finishing, Stainless steel, nickel plated, silver plated, gold plated, which one do you need? or other materials?
  • Others, such as dimple or without dimple? If for Triangle metal dome series, with legs or without legs? if with legs, which type do you want? we have 0.8*0.8 & 0.8*1.5 &0.8*3.0, three kinds of legs for Triangle metal domes for your choice.

Now I think you are clearer about the parameters about the metal domes.Hope this will be helpful for you to choose a suitable metal domes for your product.

If you are interested in more information of metal dome & metal dome array, you can visit to our products’ page for C (Circle) , F (4-Legs) , T (Triangle) , O (Oblong) Custom .

If you would like to know  the packing method of metal dome & metal dome array, please visit to Metal Dome Packing for  In Bulk, In Tube, Tape & Reel, Peel & Place (Array).

In which situation make dome array by tooling?

Customers also will ask in which situation make dome array by tooling.

Normally three situations below that need to make by tooling:

  •  The tolerance is very strict when customers require, need to make dome array by tooling;
  • The order qty is very large, over 50k pcs and dome array size over 60mm with many keys on it, so in order to save production time, we will suggest to make by tooling;
  • The dome array size is more than 90mm, need to make by  tooling, because cutting by laser under size 90mm.

Of course, customer should pay the tooling fee.

If you are interested in more information of metal dome & metal dome array, you can visit to our products’ page for C (Circle) , F (4-Legs) , T (Triangle) , O (Oblong) Custom .

If you would like to know  the packing method of metal dome & metal dome array, please visit to Metal Dome Packing for  In Bulk, In Tube, Tape & Reel, Peel & Place (Array).

What’s the tolerance for the stamping and cutting PET of dome array?

At present, have two methods to make dome array, one is cutting (by laser), another is stamping (by tooling), so some customers will ask what’s the tolerance of them, I made a comparison charts, please see it, then you can understand. Any more details want to know, please feel free to contact us.

tolerance: stamping vs cutting

the-tolerance-for-the-stamping-and-cutting-PET

If you are interested in metal dome & metal dome array, you can visit to products’s page for C (Circle) , F (4-Legs) , T (Triangle) , O (Oblong) Custom

If you would like to know  the packing method of metal dome & metal dome array, please visit to Metal Dome Packing for  In Bulk, In Tube, Tape & Reel, Peel & Place (Array).

 

Inspection for metal dome array

Please follow me to know the Inspection procedures for metal dome array.

1). Appearance of PET, it should be clean(no dirt, no Scratching);
2). Metal dome missed or double metal domes?  Can not stick together.
3) No Bubble in Assembly
4). The location of each dome is the same as the drawing of the PCB?
5). If there is EMI printing, pleas take care of the quality of the tracing;
6). Others, such as data of location holes, outline, etc.

Four-leg metal dome

Four-leg metal dome

triangle peel place dome

triangle peel place dome

If you are interested in metal dome & metal dome array, you can visit to products’s page for C (Circle) , F (4-Legs) , T (Triangle) , O (Oblong) Custom

If you would like to know  the packing method of metal dome & metal dome array, please visit to Metal Dome Packing for  In Bulk, In Tube, Tape & Reel, Peel & Place (Array).