Summary of Membrane
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Membrane switch design guide.
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2 introduction membrane switch technology has become a reliable front panel solution where environmental concerns or frequent cleaning are an issue. The sealed nature of the technology coupled with its reliability and ability to offer tremendous aesthetic flexibility make it the solution of choice f...
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3 specify type styles, colors, and sizes of all copy. Artwork should be provided to us for all logos or special symbols. We use the latest version of autocad with autoscript to generate our drawings and artwork. It is helpful for customers to supply us with an autocad dwg file, or as an alternate, a...
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4 ultraviolet hardcoats the most durable hardcoats are those that are cured by exposure to ultraviolet light. These coatings are called uv hard-coats. Hardcoats can be selectively added to many of the materials to produce parts with a velvet textured background, and gloss or anti-glare windows. Embo...
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5 switch. Standard tolerances should be +/- .015". Tolerances of +/- .010" can be held on critical dimensions such as the perimeter or cutouts. Hole center to hole center tolerances of +/- .005" can be held. Tolerances on very large parts will be greater. Tighter tolerances can be held by laser cutt...
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6 considered when specifying shielding requirements. Tail exit point flexible membrane switches are connected by means of a flexible tail that is cut from the circuit material. We have a great deal of flexibility in selecting the exit point. The tail cannot exit under or within .125" of the active k...
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7 creasing of flex circuits in many applications the tail of a membrane switch needs to be bent at or near the exit point. Extreme caution should be exercised when bending flex circuits. While it is likely that continuity will be maintained in a trace that is creased sharply, the trace will most lik...
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8 sense to consider polyester domes if the total dome usage per order is expected to exceed 2500. A drawback of polyester domes is that they tend to relax and lose their tactile feel at elevated temperatures and are not recommended for applications that will experience temperatures above 55˚c (131˚f...
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9 -45˚c to + 75˚c (see notes on polyester domes) life cycle testing holland nameplate performs life cycle testing to insure that our customers have a realistic expectation as to the typical number of cycles a particular design can endure. Any specific life requirements should be communicated to holl...
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10 that will have insertable legends. An oversized pocket is put behind this clear area so that the legend card can be inserted and seen through the window. The entire overlay has the same texture, which helps hide the fact that legends are being viewed through a window. The diffusing properties of ...
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11 always clean the surface before installing a membrane switch. If alignment is difficult, we recommend that you remove a small corner of the backing, align the membrane switch, stick the corner down, bend back the membrane switch and remove the rest of the liner. Never bend a membrane switch in an...
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12 of the membrane switch. A sample of a simple drawing of a membrane switch is included in appendix “c”. Appendix “d” is a glossary. Holland nameplate overlay material guide appendix a product id manufacturer base film hardcoat finish embossable ul rating texturable thickness melinex 561 ici polyes...
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13 holland nameplate membrane switch checklist appendix b the following items need to be communicated to holland nameplate before an order can be processed. ___ mechanical dimensions of the finished part ___ tolerance specified (+/- .015") type of switch ___ non tactile ___ tactile with stainless st...
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14 ___ customer specified shielding ___ none required ___ printed silver grid ___ printed carbon ___ aluminum foil ___ other ________________ overlay material ___ velvet textured polycarbonate (8b35) ___ gloss polycarbonate with hardcoats (8010) ___ velvet textured polyester with hardcoat (autotype)...
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15 embossing ___ key rims ___ plateau ___ led windows hydroforming ___ key rims ___ plateau ___ led windows insertable legends ___ not required ___ specified support panel ___ led windows ___ not required ___ drawing included with material specified artwork ___ holland nameplate generated ___ custom...
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16 color matching ___ custom (samples supplied) ___ pantone matching system ___ federal standard no. 595a ___ copy size, style, and location specified switch sealing requirements ___ standard splash resistant ___ nema 4 switch venting requirements ___ standard internal venting ___ externally vented.
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17 membrane sample appendix c.
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22 glossary appendix d actuation force- the maximum force measured prior to or including the point at which keypad contact closure is achieved. Alodine- a chemical conversion process that oxidizes aluminum to form a non-porous aluminum oxide. Referred to as “poor-man’s anodizing” because it is less ...
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23 overlay- top layer of a membrane switch (the graphic interface between device and user) generally made of polyester or polycarbonate. Pad emboss- a raised area on an overlay, which defines an entire graphic. (i.E., a full keypad of l.E.D. Window.) proof- a paper simulation of what a screen printe...