Feedthrough interconnection assembly

A ceramic feedthrough interconnection assembly comprising:

• A. a matrix having
• a. a first section comprising a ceramic electrically insulating material having a first dielectric constant;
• and
• b. a second section comprising a non-ceramic electrically insulating material having a second dielectric constant;
• B. said matrix further comprising:
• a. at least two trans-matrix signal leads for communicating an electrical information signal such that said signal leads are exposed exclusively to said first electrically insulating material in said first section and to said second electrically insulating material in said second section;
• and
• b. a trans-matrix auxiliary lead;
• and
• C. a shield extending through said first and second sections and electrically shielding said signal leads from said auxiliary lead, said shield in said first and second sections is of a size and shape so as to provide a defined and substantially constant impedance in said signal leads.

An optoelectrical capsule for converting information signals between an electrical signal format and an optical signal format, comprising a capsule having a feedthrough interconnection assembly comprising:

• A. a matrix having
• a. a first section comprising an electrically insulating material having a first dielectric constant;
• and
• b. a second section comprising an electrically insulating material having a second dielectric constant;
• B. said matrix further comprising:
• a. a trans-matrix signal lead for communicating an electrical information signal such that said signal lead is exposed exclusively to said first electrically insulating material in said first section and to said second electrically insulating material in said second section;
• and
• b. a trans-matrix auxiliary lead;
• and
• C. a shield extending through said first and second sections and electrically shielding said signal lead from said auxiliary lead, said shield in said first and second sections is positioned at a distance from said signal lead with respect to the dielectric constant of any electrically insulating material such that the electrical information signal experiences, and is of a size and shape so as to provide, a defined and substantially constant impedance.