Custom metal dome arrays are widely used by membrane switch manufacturers to enhance production efficiency by allowing for quicker assembly and reducing placement errors. The document details various dome array designs, including single and double layer options that can incorporate spacers and EMI shielding, catering to different applications. Additionally, the manufacturing process involves providing dimensioned drawings and specifications for tailored budgetary pricing.

1. Custom Metal Dome Arrays
Dome Array Assemblies have become common practise with many membrane switch/circuit manufacturers who
are utilising them to help take cost out and speed up assembly times. As the operator places one large dome array
in one application instead of each dome individually, production time is reduced dramatically. Quality
improvements and benefits can also be enjoyed with the reduction in placement errors and "Double Doming".
Dome arrays are also a great way of enhancing the tactile feel of a rubber keymat or simply sticking directly to a
PCB with an overlay to create a tactile switch effect.
We are able to offer an extensive range of dome array designs from simple single layer PET dome arrays to those
requiring spacers and EMI shielding layers.
Single Layer Dome Array
One of the most original styles of dome array where the domes are
placed on a layer of polyester/mylar film with an adhesive layer.
Holes or kiss cuts are required around the dome to assist with the
breathing of the dome thereby maintaining a good tactile effect. An
ideal low cost solution to stick straight to the PCB
Double Layer Dome Array
With this type of construction a spacer layer is incorporated into the
assembly. Venting for the metal domes to breath can be
incorporated into the spacer layer if required. Varying thickness and
materials can be utilised for the spacer material.
EMI Single/Double Layer Dome Array
Here the construction method is similar to the two above but in
addition a layer of silver or carbon paste is printed to provide
EMI/RFI shielding to the top of the PET film.
Double Layer with Rubber Adhesive
Utilising the construction options above we can add an additional
layer of rubber glue which is ideal for use with rubber keypads
providing enhanced adhesion characteristics.
Metal Dome Adhesive
Polyester/Mylar Carrier
(White or Clear)
Metal Dome
Polyester/Mylar Carrier
(White or Clear)
Metal Dome
Rubber Adhesive
Adhesive
Polyester/Mylar Carrier
(White or Clear)
Metal Dome
Adhesive
EMI Layer
Spacer
EMI Layer
Polyester/Mylar Carrier
(White or Clear)
Metal Dome Adhesive
Polyester/Mylar Carrier
(White or Clear)
Adhesive
Spacer
Spacer
Dome Arrays can be manufactured as simply as say one or two domes on a polyester backing to large panels which may
incorporate a large number of domes in a pattern to suit a custom application. Different size/types of domes can be incorporated
into the array design.
A dimensioned drawing with construction requirements along with dome sizes and parameters and yearly quantities are needed
to make an offer. Budgetary pricing can be provided from hand sketches if required.
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