Compliant interconnect apparatus with laminate interposer structure

Apparatus to electrically connect a first electrical contact to a second electrical contact, comprising:

• opposed upper and lower elastomer layers having opposed inner and outer faces, the inner faces of the opposed upper and lower elastomer layers formed on either side of an intermediate layer together forming a laminate interposer structure having a thickness;
• an electrically conducting elastic column to provide a localized conductive path through the thickness of the laminate interposer structure between the outer faces of the opposed upper and lower elastomer layers;
• the upper and lower elastomer layers to provide compliance between the upper and lower elastomer layers and the elastic column;
• the intermediate layer to provide inhibited compliance between the intermediate layer and the elastic column relative to the compliance between the upper and lower elastomer layers and the elastic column;
• a spacer, to regulate compression against the elastic column, positioned in juxtaposition relative to the outer face of one of the upper and lower elastomer layers;
• the intermediate layer comprises a sheet of material substantially rigid along a plane substantially perpendicular relative to the elastic column;
• the elastic column has an elongate shape disposed along a longitudinal axis substantially perpendicular relative to the laminate interposer structure, including the plane;
• and
• the sheet is formed with an inwardly-directed continuous edge confronting and encircling an intermediate portion of the elastic column between the opposed upper and lower ends of the elastic column.