We are an established leader in the
membrane switch industry, specializing in applications with
stringent cosmetic and reliability requirements. Maintaining
constant color, cosmetic quality and functional reliability with
each order ensures that your membrane switches and graphic overlays
will perform flawlessly in the field and throughout your products
Membrane switches are the integral part of any
control panel. With increased automation all the processes are
controlled from a central location. The central control is done
using panels that provide facility to switch and programme the
process by means of easy to operate membrane switches / keyboards.
We provide you with these membrane switches / keyboards that improve
your product image, where customer satisfaction is always exceeded
in terms of timely delivery and satisfaction in totality.
Precision Switch Technology Customized & Complete
Today's environment of "Zero
Defects", ISO, SPC, JIT delivery and other management concepts, all
geared toward premium membrane switches and graphic overlays
delivered on time, demands quality. That's why Douglas has developed
company-wide practices which assure uncompromised production
excellence on every program we're awarded. That means you can expect
perfection in all facets of membrane switch and graphic overlay
production...even down to color, finish and surface texture match.
We live and breathe precision.
Whether your switch project involves a multi-tasking circuit design,
assembly and surface mounted components or precise print
registration — our skilled people put their knowledge to work
everyday in an environment of total quality control at each stage of
Custom design expertise.
Single source manufacturing.
Assembly of surface mount
Multi-tasking switch pattern
Custom molded boxes, bezels and
frames with switch
Precise color matching and
Small volumes to high volumes in
quick turnaround time
100% function testing of all circuits
Our design engineers
with over a decade of industry experience understand your needs and
help design membrane switches which meet your most complex
applications with quality that improves image of your product. When
you call us, you can expect immediate answers to your technical
questions & ideas.
Imaging & Printing
Our strength in
printing complex circuits is been achieved through continual up
gradation of the printing facility to meet the latest technology
requirements. We operate in all kind of inks with traditional
heating units for resistive technology and UV inks for graphic
light-assembly processes from the die-cut department to finishing
inspection and shipping. The product is kitted with add-ons like
LEDs, resistors, capacitors and other SMD components as per your
need. Here the separate layers and units come together and the
finished product is completed. The quality of our work is right at
your finger tips.
Specifications will vary depending on
materials, construction and circuitry. Please consult Douglas
Engineering for specific characteristics.
Operating Voltage: 0-30 VDC.
Operating Current: 100 MA Max.
Operating Contact Resistance:
Less Less than 100 OHMS typical
(measured at the connector).
Less than 10 Milliseconds typical.
Printed silver conductive inks or carbon blend
(PC board assemblies available).
RFI and Static Shielding
available in most configurations.
Life Expectancy: URL guarantees
1,000,000 actuations per switch
position or 12 months.
Actuation Force: 2 -12 oz.
range available —
depending on customer
(4 - 8 oz. is considered medium actuation
force for non-tactile
Switch Travel: .005" to .030"
Overall Thickness: .020" to .050"
-40°C (-40°F) to +70°C (158°F).
Storage Altitude: Sea level to 40,000
Operating Temperature and Altitude:
Variable depending on customer requirements
(can be designed to operate in most environments).
Humidity: No delamination after 24
at 85°C and 85%RH.
The specifications above are general.
on more specific applications, contact one of our design engineers.
Design freedom begins when you
integrate membrane switches into your product. Because no single
configuration can always meet your requirements, we will tailor your
membrane switch and graphic overlay to fit the application and your
Depending on the application and
requirements, Polyester and
Polycarbonates are commonly
used. Thickness ranges are .007" to .010". Blended
materials and UV hardcoat surfaces are additional options.
• Selective Texturing:
hardcoats as well as aesthetic enhancement of the
of the key pads for key location can be
achieved by full key pad embossment or rim embossment.
Transparent and deadfront display
LCD and LED displays.
Tail termination is accomplished by
snap fit connectors,
solder tabs, or exposed silver tabs (.100" centers typical).
• Tactile Feedback:
Stainless steel domes range from
8-12mm. Poly domes are
embossed onto a polyester layer or circuitry.
Shielding from EMI/RFI can be
accomplished by a layer of
metallized polyester or by screening a layer of selective
URL offers several options for the
readout devices available to fit customer requirements.
• Panel Cutouts:
cut holes and access for mechanical switches may be
incorporated into membrane switch designs.
• Back-Plates and Printed
as a finished assembly with URL membrane
• Environmental Design:
Applications subject to various
degrees of moisture or high
humidity are engineered and constructed
• Graphic Design and
service art and engineering departments are ready to
provide complete or partial
assistance in the aesthetic design
of graphic overlays and the engineering of correct switch
construction for your application.
The more information
supplied regarding application, requirements
and environment, the more accurate our quotation will be.
for prototypes and production.
material, polycarbonate or polyester.
Number of colors to be
printed on graphic overlay.
Overall dimensions or
Type of termination
required and tail length.
Dome type, if tactile
feel is needed.