In various examples, a neurostimulation interconnection apparatus apparatus includes a substrate disposed within a header of a neurostimulation device. The BiFET semiconductor device comprises a HBT structure, a high-resistivity structure, and a FET structure, sequentially formed in this order from bottom to top on a semi-insulating substrate. The o-nitrophenoxyketone is hydrogenated to form the corresponding benzoxazine, which is thereafter acylated with an acylhalide to produce the acylamide, such as 4-dichloroacetyl-3,4-dihydro-3-methyl-2H-1,4-benzoxazine. A control device is provided in a constructional unit with at least one assembled conductor board. The seal has a sealing rim that is in constant contact with the base portion and provides an upward spring force to hold the sealing disc in the normally closed position.