Venting system and shield for keyboard

A keyboard assembly, comprising:

• a substrate comprising a surface defining recesses;
• an array of key assemblies, each of the array of key assemblies positioned at least partially within a unique one of the recesses;
• and
• a shield beneath the printed circuit board and defining a venting system in fluid communication with each of the array of key assemblies;
• wherein
• the array of key assemblies is affixed to the substrate.

A shield for an input device, comprising:

• a base layer;
• an aluminum layer positioned over the base layer;
• a graphite layer positioned over the aluminum layer;
• an intermediate layer positioned over the graphite layer;
• an adhesive sheet positioned over the intermediate layer;
• and
• a conductive ring substantially surrounding the adhesive sheet.