Visit us on the World Wide Web... or us!

Transcription

1 CATALOG NO. M9703

2 1

3 Introduction Construction and Operation Suggested Design Route Panel Layout Window Clarity Environmental Considerations Chemical Resistance Chart Embossing Printing Requirements Operational Characteristics Electrical Design Backlighting Mounting Considerations Quality Standards for Metal Backers Membrane Lamination Custom Panel Information and 34 2

4 INTRODUCTION WHAT IS A MEMBRANE SWITCH PANEL? TECHNICAL HELP TYPES OF MEMBRANE SWITCH PANELS Graphic Layer 3

5 Graphic Adhesive Disc Retainer Disc Spacer Metal Tactile Upper Circuit Circuit Spacer Lower Circuit Rear Adhesive Plastic Tactile (Polyester dome) 4

6 CONSTRUCTION & OPERATION Graphic Layer Flat Rim Embossed Disc Retainer Graphic Layer Graphic Adhesive Metal Tactile Graphic Adhesive Upper Circuit Disc Spacer Upper Circuit Circuit Spacer Circuit Spacer Lower Circuit Lower Circuit Rear Adhesive Metal Tactile Rear Adhesive Non-tactile Graphic Layer Graphic Layer Circuit Spacer Graphic Adhesive Circuit Plastic Tactile Upper Circuit Circuit Spacer Domed Graphic Tactile Rear Adhesive Plastic Tactile Lower Circuit Rear Adhesive 5

7 WHEN CAN I USE A MEMBRANE SWITCH PANEL? Design Notes TYPICAL OPERATING CHARACTERISTICS Current Rating For Each Switch Circuit Voltage Switch Power Rating Switch Capacitance IP Rating Chemical Resistance Ambient Temperature ESD/RFI 6

8 SUGGESTED DESIGN ROUTE FOR MEMBRANE SWITCH PANELS Can I use membrane switch technology? No Investigate other C&K switch product ranges Yes Panel layout & graphical layer specification, tail length & location No Are display windows required? Yes Type of display LCD,LED,VFD Scratch Resistance Ambient Light Conditions Optical Filtering Requirements Environmental Considerations Working Temperature Chemical Resistance Storage Temperature Humidity No Is graphic layer embossing required? Yes Rim Embossing Pillow Embossing Braille Characters Keypad Design Considerations Tactile or Non-tactile Metal or Polyester Dome Space Bars & Large Keys Permanent Legends or Insert Legends Graphic layer Material Selection Printing Requirements Text & Typeface Insert Legends Logos & Icons Permanent Legends or Insert Legends Operational Parameters Life Cycles Power to be Switched Screening for EMC Electrical Design Complete C&K customer information document for quotation (see pages 33 and 34) Switch Size & Location Connector Specification Tactile Specification Circuit Design & Connector Tails 7

9 PANEL LAYOUT: DISPLAYS AND GRAPHICS WINDOW CLARITY AND OPTICAL FILTERING Liquid Crystal Display Summary LED Displays 8

10 Filtering Standard Red LED Displays Filtering High Efficiency Red Displays Filtering Yellow Displays Filtering Green Displays Summary Vacuum Fluorescent Displays Summary 9

11 % Transmission vs Wavelength % Transmission vs Wavelength C&K 1 Yellow C&K 4 Red nm nm % Transmission vs Wavelength % Transmission vs Wavelength C&K 3 Red C&K 5 Blue nm nm % Transmission vs Wavelength % Transmission vs Wavelength C&K 2 Yellow C&K 7 Green nm nm 10

12 % Transmission vs Wavelength % Transmission vs Wavelength C&K 6 Blue C&K 8 Green nm nm ENVIRONMENTAL CONSIDERATIONS Temperature Humidity 11

13 Chemical Resistance CHEMICAL RESISTANCE CHART Summary Autotex 2 Bayfol Reagent (coated polyester) (blended polycarbonate) Polycarbonate Acetone X Benzyl alcohol X X X Cyclohexanone X Diesel oil Diethyl ether X Dimethylformamide X X Ethanol Ethyl acetate X X Genklene (1, 1, 1-trichlorethane X Methylene chloride X Methyl ethyl ketone X X X Nitric acid <10% Perklone (perchlorethylene) X Petrol * Sodium hydroxide <10% Toluene X X Trichlorethylene X X Xylene X 12

14 EMBOSSING Rim Embossing 0.5mm R Rim Embossing Pillow Embossing Summary Height measured from base = 2 1/2 material thickness Pillow Embossing 13

15 Tactile Graphic Domes Diagram Showing Domed Graphic 3mm Min. Domed Graphic Tactile 3mm Min. 5mm Min. Graphic Layer Circuit Spacer Circuit Rear Adhesive 5mm Min. Braille Characters Embossing Style 5mm Min. 5mm Min. Keypad Design 14

16 Graphic Layer Material Material Selection PRINTING REQUIREMENTS Screen Process Printing Printing Process 15

17 Wash Out UV Light Positive Photosensitive Stencil Emulsion Tensioned Screen Frame Stock Squeegee Ink Printing base Off Stencil Contact 16

18 Graphic Layer Production 17

19 Face Side with black removed 1. Black 2. Dark Gray 3. Light Gray Sequence from reverse side Black Black + Dark Gray Black + Dark Gray+ Light Gray Design Hints Text and Logos 18

20 Typefaces Standard STOP 20 Pt Condensed AB helvetica futura garamond serif typeface Logos and Icons Summary Insertable Legends 19

21 Side Loading Insert Insert Window Printed Image Insert Rear Loading Insert Insert Insert Window Membrane Assembly Printed image Membrane Assembly Summary Secret Text 20

22 OPERATIONAL CHARACTERISTICS Life Cycles Static Sheilds Dielectric Characteristics of Materials Dielectric Strength Volume Resistivity Polyester 125kV/mm 10 9.cm Polycarbonate 67kV/mm 10 8.cm Bayfol 50kV/mm 10 7.cm Summary 21

23 ELECTRICAL DESIGN Switches Flat Rim Embossed Graphic Layer Graphic Layer Graphic Adhesive Graphic Adhesive Upper Circuit Circuit Spacer Plastic Tactile Upper Circuit Circuit Spacer Lower Circuit Rear Adhesive Lower Circuit Rear Adhesive Non-tactile Plastic Tactile Typical Two Circuit Switch Typical Single-sided Circuit Switch 22

24 Conductive Inks ohm Summary Tactile Specification and Usage Polyester Dome 23

25 Metal Dome Summary Space Bars Summary Designing for Tactiles 24

26 Connector Tail Summary 25

27 A Bezel Mounting B Surface Mounting C D Form Smooth Route Tail Filter Connectors Standard Numbering Summary 26

28 CONNECTOR SPECIFICATIONS Body Material Insulation Temperature Range Voltage Limit Standard Connector Glass filled polyester (UL 94V-0) 10 3 M 40C to 150C >500V RMS Number of Ways 2 to 25 End-stackable Color Yes Black Integral Components Contact Material Finish Spring finish Current rating Resistance Insertion force (maximum) Withdrawal force (minimum) Copper alloy Gold or tin/lead Gold or tin/lead 3A 20m maximum 3N/contact 0.25N/contact BACKLIGHTING Mounting Considerations 27

29 Metal Back Plates Plastic Moldings Dimensional Tolerances 28

30 QUALITY STANDARDS FOR METAL BACKERS General Tolerances Material Thickness Burrs Plating/Painting Surface Finish Studs/Standoffs Threads 29

31 Package MEMBRANE LAMINATION AND HANDLING Purpose Scope Procedure 30

32 Notes on Handling When Removing the Backing Paper Membrane Assemblies With Tactile Domes Connectors and Tails 31

33 Backing Paper Cut off strip of paper here Adhesive Ensure recess provides sufficient clearance around membrane Do not fold or crease here Force out air in this direction No tactile switches to be on this line 32

34 Custom Membrane Switch Panel Information This form is for information purposes. It does not constitute an order. 1 CUSTOMER DETAILS Customer: Customer Contact: Customer Telephone No.: Customer Fax No.: C&K Rep.: Distributor: Check One: Quotation Qtys: Annual Usage: Target Price: New Project Existing Project 2 PHYSICAL & ENVIRONMENTAL Storage Temp (C): max. min. Finished panel size: inches high Operating Temp (C): max. min. inches wide Will the panel be exposed to UV for extended periods of time? Yes No Describe application: Minimum number of operations required per switch: Please sketch panel details below. Indicate windows, cutout areas, tail dimensions, switch sizes, and switch spacing along with other relevant information. Customer print number: Note: Standard membrane mfg. tolerance is.01 (0,25mm). 3 WINDOWS (Check all that apply) COLOR SURFACE FINISH Small LED Lenses: Clear Filtered Deadfront Gloss Textured Anti-Glare Large Display Windows: Clear Filtered Deadfront Gloss Textured Anti-Glare What type of display is used behind the large windows? LED LCD VFD 33

35 Custom Membrane Switch Panel Information This form is for information purposes. It does not constitute an order. 4 GRAPHIC LAYER DETAILS What surface finish is required? Gloss finish Velvet texture Fine texture Selective texture How many graphics colors are required? (Remember to count the background as a color!) How many different filters? 5 SWITCHES How many of each type of switch are required? Flexible non-tactile PCB based metal tactile Operating current: Flexible metal tactile Other, specify: Operating voltage: Flexible polyester dome tactile Total number of switches Switch Embossing: No embossing Pillow embossing Rim embossing 6 OUTPUT Is an ESD/RFI shield required? Yes No Rows x Columns Type of circuitry? Common line Matrix Matrix output: Number of positions on connector? How many tails are required? (Remember to indicate the location and length of tail(s) on the sketch in Section 2) Should tail(s) be preformed? Yes No What type of connector? C&K (standard) Female Male Berg Clincher (Check all that apply) Tin/Lead Gold None ZIF compatible Other 7 MOUNTING DETAILS What type of material will the panel adhere to? If C&K should supply the backer panel, describe here: What type of fasteners should be installed on backer or pcb? 8 ADVANCED CONSTRUCTION Should SMD LEDs be embedded in this panel? If so, identify quantity, styles and colors: Does the panel require insert legends? Will C&K supply the inserts? 9 GENERAL COMMENTS Yes Yes Yes No No No 34

36 Notes 35

37 Embedded Electronics Printed Resistors Conductive Rubber Switch Pads Non-Conductive Rubber Actuators Custom Injection Molded Housings ESD Shielding EMI/RFI Shielding Standard Products 4000 Series Membrane Keypads 4200 Series Insertable Legend Keypads 4800 Series Vandal Resistant Keypads Other 36

38 CORPORATE HEADQUARTERS C&K Components, Inc. 57 Stanley Avenue Watertown, MA USA Tel: (617) Fax: (617) SALES/CUSTOMER SERVICE DIRECT: (800) C&K Switches, Ltd. Cunliffe Drive Northfield Avenue Kettering Northamptonshire NN16 8LF England Tel: Fax: Printed in U.S.A