Patent ID: 8310838

Claim:
An electric drive comprising: a motor housing having a casing bottom with a surface; an electric motor with a stator and a rotor with the stator including an electrical winding; a circuit board having a mounting surface, the circuit board lying over a portion of the surface of the casing bottom in a heat-conducting path; means for electrically connecting the winding of the stator to the circuit board; a plurality of conductor tracks formed on the mounting surface; a plurality of contact openings with plated through-holes formed in the circuit board, each through-hole having a contact surface area of a first predetermined diameter; at least one electronic component mounted on the mounting surface; a protective layer of insulating material formed from parylene coating the mounting surface, the conductor tracks, the contact surface areas of the plated through- holes, and the electronic component; and press-fit contacts, each contact of a second predetermined diameter sufficient to separate and displace the parylene to expose the contact surface area of a through-hole, each press-fit contact being inserted in a mating through-hole whereby the insertion of each press-fit contact separates and displaces the parylene to expose the surface area of a mating through-hole thus creating a mechanical press-fit connection which provides an electrical contact between a press-fit contact and plated through-hole of the contact opening, the first and second diameters dimensioned such that the mechanical press-fit contact is formed even without the protective layer on the contact openings.