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Abstract

A thermoelectric device that realizes miniaturization and densification, an optical module incorporating the thermoelectric device, and their production method. N-type thermoelectric elements 51 and p-type thermoelectric elements 52 are arranged orthogonally and alternately, on the XY-plane, in a matrix consisting of at least four elements in total in a row and at least four elements in total in a column. All the thermoelectric elements 51 and 52 have a size of at most 250 .mu.m in the X and Y directions. At most four thermoelectric elements nearest to an n-type thermoelectric element 51 are of p type, and at most four thermoelectric elements nearest to a p-type thermoelectric element 52 are of n type. The thermoelectric elements 51 and 52 are bonded through metallic bonding materials to electrodes 53 having the shape of a rectangle or a rounded rectangle formed on an insulating substrate 54.

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First Claim