1. An electric power steering apparatus comprising a steering column in which a steering shaft through which steering torque is transmitted is installed, and an electric motor to transmit via a speed reducer in a speed reduction gear box a steering assist force to the steering shaft, wherein
the electric motor and a control unit to drive the electric motor are juxtaposed in the speed reduction gear box;
a terminal block is provided at an outer circumference of a flange proximate to the control unit of the electric motor, a terminal box surface of the terminal block being provided so that a plane direction faces a direction vertical to an axis line of the electric motor, the motor side connecting terminal of the electric terminal being held on the terminal block surface;
the unit side connecting terminal provided at a position proximate to the electric motor of the control unit is arranged so as to overlap with the motor side connecting terminal on the terminal block surface; and
the unit side connecting terminal and the motor side connecting terminal are coupled at a coupling portion,
wherein the motor side connecting terminal is provided with a bent portion at a side proximate to the control unit, and,
wherein the motor side connecting terminal is provided with a rising slope so as to apart from the terminal block surface, imparts an elastic backlash to the unit side connecting terminal as the motor side connecting terminal goes from the bent portion toward a terminal tip.
2. The electric power steering apparatus according to claim 1, wherein the motor electric motor and the control unit are arranged on the speed reduction gear box in series in an axial direction of the electric motor.
3. The electric power steering apparatus according to claim 1, wherein the coupling portion couples the unit side connecting terminal and the motor side connecting terminal from an axial direction of the steering column.
4. The electric power steering apparatus according to claim 1, wherein the coupling portion is a fixing screw for fastening to the terminal block together with unit side connecting terminal and the motor side connecting terminal from a direction vertical to a shaft line of the electric motor.
5. The electric power steering apparatus according to claim 4, further comprising a speed reduction gear box fixing screw to fix the control unit to the speed reduction gear box, the speed reduction gear box fixing screw extending in the same direction as the fixing screw to be mashed with the unit side connecting terminal.
6. The electric power steering apparatus according to claim 1, wherein the coupling portion is solder welding to bond the unit side connecting terminal and the motor side connecting terminal to the terminal block.
7. The electric power steering apparatus according to claim 6, wherein a set of the overlapped unit side connecting terminal and the motor side connecting terminal is arranged multiple adjacent to one another, and a solder splash preventing wall to prevent splash of solder is provided between the adjacent set.
8. The electric power steering apparatus according to claim 1, wherein a terminal holder holding the unit side connecting terminal is provided at a position proximate to the electric motor of the control unit, one fixing concave and convex being provided at a position facing the electric motor of the terminal holder;
the other fixing concave and convex are provided on the terminal block of the electric motor proximate to the terminal holder; and
when the one fixing concave and fixing convex of the terminal holder and the other fixing concave and convex of the terminal block are engaged, the unit side connecting terminal overlaps with the motor side connecting terminal.
9. The electric power steering apparatus according to claim 1, wherein a guide wall is provided on the terminal block to guide the unit side connecting terminal in a direction in which the unit side connecting terminal overlaps with the top of the motor side connecting terminal.
10. The electric power steering apparatus according to claim 1, wherein a terminal cover covering around the unit side connecting terminal and the motor side connecting terminal is detachably provided on the terminal block.
11. The electric power steering apparatus according to claim 10, wherein the terminal cover slidably moves, while being engaged with the terminal block, to a position covering around the unit side connecting terminal and the motor side connecting terminal from an outer circumference of the electric motor apart from the control unit.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method comprising the steps of:
forming a two-dimensional array of spots on lead segments of a lead frame, each spot comprising a circular recessed portion and a piled ring of metallic material above and around the recessed portion;
affixing a semiconductor chip on the lead frame; and
encapsulating the semiconductor chip and the two-dimensional array of spots on the lead frame with a mold compound.
2. The method of claim 1, in which the forming step further includes using a pulsed laser.
3. The method of claim 1, in which the leadframe is made of a metal.
4. The method of claim 3, in which the metal includes a base metal covered by a layer of a surface metal different from the base metal.
5. The method of claim 4, in which the spots expose the base metal in the recessed portion, and the piled rings include the surface metal in amorphous configuration.
6. The method of claim 5, in which the array of spots includes substantially linear rows and lines.
7. The method of claim 6, in which the diameter of a spot is about 20 to 30 \u03bcm.
8. The method of claim 7, in which the pitch of the spots is less than 50 \u03bcm center-to-center, and the pitch of the rows is less than 50 \u03bcm centerline-to-centerline.
9. The method of claim 1, further comprising forming a second two-dimensional array of spots on regions of a pad.
10. A method comprising the steps of:
forming a two-dimensional array of spots on a carrier, which includes insulating compound integral with conductive traces and vias, each spot comprising a circular recessed portion and a piled ring of the insulating material above and around the recessed portion;
affixing a semiconductor chip on the carrier; and
encapsulating the semiconductor chip and the two-dimensional array of spots on the carrier with a mold compound.