Method of manufacturing composite array structure

A method of manufacturing a composite array structure which comprises a plurality of discrete elements of an electrically conductive composite material interconnected by at least one region of at least one electrically insulating flexible material for use in a current limiter device, the method comprising the steps of:

• providing at least one electrically conductive composite material;
• forming at least one depression in the at least one electrically conductive composite material, said depression having a depth less than a thickness of said electrically conductive composite material, thereby forming first regions of said electrically conductive material, said thickness being measured in a direction of the depth of said depression, said first regions of said electrically conductive material still being connected together by second regions of said electrically conductive material below said depression;
• providing an uncured electrically insulating flexible material;
• depositing the uncured electrically insulating flexible material in the at least one depression in the electrically conductive composite material;
• curing the uncured electrically insulating flexible material to form said at least one region of at least one electrically insulating flexible material, wherein an exposed surface of said region of said electrically insulating flexible material is below an exposed surface of said first regions of said electrically conductive composite material;
• and
• removing at least a portion of said second regions of said electrically conductive composite material directly below said at least one region of said electrically insulating flexible material, to form the composite array structure.