Electrical device, in particular microbattery, and method for the production

An electrical device, comprising:

• a housing part of a housing, the housing part being made of a metal and including a feedthrough therethrough, at least one opening as a part of the feedthrough, a first region, and a second region, the metal of the housing part being iron, an iron alloy, an iron-nickel alloy, an iron-nickel-cobalt alloy, KOVAR, steel, or stainless steel, the at least one opening extending about an axis, the first region including the at least one opening, the second region being adjacent to the at least one opening, the at least one opening receiving a conductive material or a conductor in a glass material or a glass-ceramic material, wherein the conductive material has a first coefficient of expansion α1, the glass material or the glass-ceramic material has a second coefficient of expansion α2, and the housing part has a third coefficient of expansion α3, the third coefficient of expansion α3 being always greater than the second coefficient of expansion α2, wherein:
• (i) the housing part includes a flexible flange, the flexible flange having a free space F between a raised region or a lowered region of the housing part and having a connecting region;
• or
• (ii) the first region including a width W that is substantially perpendicular to the axis of the at least one opening, the width W of the first region being always greater than a thickness D2 and a thickness DE of the second region;
• or
• (iii) a combination of (i) and (ii).