Non-light-emitting, variable transmission device and a process of fabricating the same

A non-light-emitting, variable transmission device comprising:

• a first substrate;
• a first transparent conductive layer overlying the first substrate;
• an electrochromic layer overlying the first transparent conductive layer;
• a second transparent conductive layer overlying the electrochromic layer;
• a second substrate;
• and
• an interlayer disposed between the first substrate and the second substrate,
• wherein:
• the interlayer has a moisture content of at most 0.05 wt %;
• or
• a barrier layer is disposed between the second transparent conductive layer and the interlayer, and the barrier layer extends at least partly through the second transparent conductive layer or overlies a passageway that extends at least partly through the second transparent conductive layer.

A process of fabricating a non-light-emitting, variable transmission device, the process comprising:

• forming a first transparent conductive layer overlying a first substrate;
• forming an electrochromic layer overlying the first transparent conductive layer;
• forming a second transparent conductive layer overlying the electrochromic layer;
• joining the first substrate and a second substrate using an interlayer disposed between the
• second conductive layer and the second substrate,
• wherein:
• the interlayer has a moisture content of at most 0.05 wt %;
• or
• the process further comprises forming a barrier layer that extends at least partly through the second transparent conductive layer, wherein joining the first and second substrates is performed after forming the barrier layer.