Timer switch

An electrochemical switch for delayed switching comprising:

• a source contact, a drain contact and a switch channel, which channel comprises electrochemically active material and electrically connects said source contact to said drain contact;
• a delay reservoir of electrochemically active material arranged in contact with said switch channel;
• a gate electrode;
• and
• an electrolyte ionically connecting both said switch channel and said delay reservoir to said gate electrode;
• means for applying a potential across said electrolyte such that an electrochemical reaction between said delay reservoir and said gate electrode is initiated;
• means for maintaining a potential across said electrolyte such that a front of said electrochemical reaction first propagates in said delay reservoir until said front reaches said switch channel, before said electrochemical reaction alters the electrical conductivity of said switch channel such that it switches.

An electrochemical timer switch comprising a source contact;

• a drain contact;
• a gate electrode;
• an electrochemically active element defining a delay reservoir and a switch channel;
• and an electrolyte being in contact with the electrochemically active element and the gate electrode thereby facilitating an electrochemical reaction between the electrochemically active element and the gate electrode;
• said switch channel being arranged between and in contact with said source and drain contacts and having the ability of altering electrical conductivity through said electrochemical reaction;
• and said delay reservoir separating said switch channel from said gate electrode thereby preventing the switch channel from participating in said electrochemical reaction unless the delay reservoir is first electrochemically reacted to a predetermined extent.