Miniature motor

A miniature motor comprising:

• a housing having a bottomed hollow cylindrical shape with an inner circumferential surface;
• a permanent magnet fixedly fitted to said inner circumferential surface;
• a rotor having an armature and a commutator;
• an end bracket having brushes fitted to an open end of said housing and making sliding contact with said commutator;
• input terminals electrically connected to said brushes;
• bearings rotatably supporting said rotor, said bearings being positioned on said housing and said end bracket;
• spark-quenching means connected between said armature and said commutator including a ring-shaped laminated ceramic capacitor having electrodes on an outer surface, said electrodes being of a same number as a number of poles of said armature, said capacitor having an electrostatic capacity of more than 1 .mu.F, said ring shaped laminated ceramic capacitor being formed of thin sheets of highly dielectric material and thin-film internal electrodes formed of an electrically conductive material, and having a sector shape, said internal electrodes and said dielectric material being alternately laminated in an axial direction of said ring-shaped laminated ceramic capacitor, said ring-shaped laminated ceramic capacitor being formed by portions of said internal electrodes being overlapped in a projected plane orthogonally intersecting an axis of said rotor, each of said internal electrodes having a terminal facing an outer circumferential surface of the capacitor, wherein said electrodes on an outer surface are each connected to a corresponding terminal to electrically connect said commutator and said armature.