Editing BTC foam and foil (section)

==Gallery==
===Discrete===
The [[BTC 5151]] PCB has exposed pads, so the foam discs in theory will be insulated. This is a linear example with helical springs.

<gallery widths=250 heights=167>
File:BTC_5151_PCB_top.jpg                          | Circuit board top, with exposed pads
File:BTC_5151_top_of_key_switch_with_spring.jpg    | Top of key switch with spring 
File:BTC_5151_foam_and_foil_is_still_pristine!.jpg | Switch module viewed from below, showing the foam pads and foil discs
File:BTC_5151_key_switch_with_spring_removed.jpg   | Switch with spring removed
File:BTC_5151_Keytronic_style_key_caps.jpg         | Keycap mount, keycap aspect
</gallery>

The [[BTC 5060]] PCB does however have solder mask over the pads. The design of the slider modules is different to those in the BTC 5151.

<gallery widths=250 heights=187>
File:BTC-5060-PCB-Detail.JPG        | Sense pads on the PCB are covered with solder mask, insulating them
File:BTC-5060-Foil-Pads-Detail.JPG ‎ | Foil discs
File:BTC-5060-Switch-Components.JPG | Switch components
</gallery>

===Non-discrete===
The following pictures are from a [[BTC 5100]]. This example is tactile and uses buckling rubber sleeves.

<gallery widths=250 heights=187>
File:BTC 5100 -- sliders and sleeves.jpg | Sliders with [[buckling rubber sleeve]]s
File:BTC 5100 -- sliders with foil.jpg   | Sliders with foil layers
File:BTC 5100 -- slider detail.jpg       | Slider detail
File:BTC 5100 -- PCB (top).jpg           | Top of PCB with capacitive pads
</gallery>