Electronic component mounting head, and apparatus and method for mounting electronic component
An electronic component mounting apparatus includes an electronic component mounting head for holding an electronic component and an up/down device for pressing the electronic component against a circuit board, and the electronic component is pressed against the circuit board while ultrasonic vibrations are applied from an ultrasonic transducer of the electronic component mounting head to the electronic component via a component holding unit, so that the electronic component is mounted onto the circuit board. In the electronic component mounting apparatus, the electronic component is heated via the component holding unit by radiant heat from a heater fixed to the component holding unit in a noncontact state, so that even when the electrothermal heater is replaceably attached, characteristics of the ultrasonic vibrations applied to the electronic component can be maintained constant.
1. An electronic component mounting apparatus for mounting an electronic component onto a circuit board using an ultrasonic wave, the apparatus comprising:
a component holding unit for holding the electronic component;
a supporter to which the component holding unit is attached;
a heating unit, which is fixed to the supporter in non-contact state with the component holding unit, for applying radiant heat so as to heat the electronic component in a state of being held by the component holding unit;
an ultrasonic transducer for applying ultrasonic vibrations to the electronic component via the component holding unit; and
a pressing device for pressing the electronic component toward the circuit board via the supporter and the component holding unit,
wherein the component holding unit has a hole portion into which the heating unit is inserted,
wherein the heating unit is held by the supporter in a state of being inserted in the hole portion without coming into contact with an inner surface of the hole portion,
wherein the hole portion is a through hole formed in a direction perpendicular to a direction of vibrations of the component holding unit by the ultrasonic transducer, and
wherein the heating unit is held by the supporter from both sides of the through hole.
2. The electronic component mounting apparatus according to claim 1 , wherein the heating unit is an electrothermal heater, and
wherein a gap of not less than 7.5 μm and not more than 100 μm is provided between a surface of the heater and an inner surface of the hole portion.
3. The electronic component mounting apparatus according to claim 1 , wherein the supporter supports the component holding unit only at a nodal portion of vibrations of the component holding unit by the ultrasonic transducer.
4. The electronic component mounting apparatus according to claim 1 , further comprising a thermometer for measuring temperature of the component holding unit or temperature of the electronic component held by the component holding unit, the thermometer being arranged in a non-contact state with the component holding unit.
5. The electronic component mounting apparatus according to claim 1 , further comprising a thermocouple, which is inserted into a hole portion formed in the component holding unit, for measuring temperature of the component holding unit, the thermocouple being arranged in a non-contact state with the component holding unit.
6. An electronic component mounting apparatus for mounting an electronic component onto a circuit board using an ultrasonic wave, the apparatus comprising:
a component holding unit for holding the electronic component;
a supporter to which the component holding unit is attached;
a heating unit, which is fixed to the supporter in non-contact state with the component holding unit, for applying radiant heat so as to heat the electronic component in a state of being held by the component holding unit;
an ultrasonic transducer for applying ultrasonic vibrations to the electronic component via the component holding unit; and
a pressing device for pressing the electronic component toward the circuit board via the supporter and the component holding unit,
wherein the component holding unit has a hole portion into which the heating unit is inserted,
wherein the heating unit is held by the supporter in a state of being inserted in the hole portion without coming into contact with an inner surface of the hole portion,
wherein the component holding unit comprises a vibration transmitting member and a holding tool, the vibration transmitting member having the hole portion formed therein and being arranged so as to extend in parallel to the direction of vibrations of the component holding unit by the ultrasonic transducer, and the holding tool being attached to one end of the vibration transmitting member for holding the electronic component, and
wherein a central axis of the hole portion in the vibration transmitting member is arranged so as to perpendicularly intersect a central axis of the vibration transmitting member, and the hole portion is arranged so as to be in plane symmetry with a plane including the central axis of the hole portion and the central axis of the vibration transmitting member.
7. The electronic component mounting apparatus according to claim 6 , wherein the heating unit is an electrothermal heater, and
wherein a gap of not less than 7.5 μm and not more than 100 μm is provided between a surface of the heater and an inner surface of the hole portion.
8. The electronic component mounting apparatus according to claim 6 , wherein the supporter supports the component holding unit only at a nodal portion of vibrations of the component holding unit by the ultrasonic transducer.
9. The electronic component mounting apparatus according to claim 6 , further comprising a thermometer for measuring temperature of the component holding unit or temperature of the electronic component held by the component holding unit, the thermometer being arranged in a non-contact state with the component holding unit.
10. The electronic component mounting apparatus according to claim 6 , further comprising a thermocouple, which is inserted into a hole portion formed in the component holding unit, for measuring temperature of the component holding unit, the thermocouple being arranged in a non-contact state with the component holding unit.
11. An electronic component mounting apparatus for mounting an electronic component onto a circuit board using an ultrasonic wave, the apparatus comprising:
a component holding unit for holding the electronic component;
a supporter to which the component holding unit is attached;
a heating unit, which is fixed to the supporter in non-contact state with the component holding unit, for applying radiant heat so as to heat the electronic component in a state of being held by the component holding unit;
an ultrasonic transducer for applying ultrasonic vibrations to the electronic component via the component holding unit; and
a pressing device for pressing the electronic component toward the circuit board via the supporter and the component holding unit,
wherein the component holding unit has a hole portion into which the heating unit is inserted,
wherein the heating unit is held by the supporter in a state of being inserted in the hole portion without coming into contact with an inner surface of the hole portion,
wherein the component holding unit comprises a vibration transmitting member and a holding tool, the vibration transmitting member having the hole portion formed therein and being arranged so as to extend in parallel to a direction of vibrations of the component holding unit by the ultrasonic transducer, the heating unit being inserted in the hole portion and the ultrasonic transducer being attached at one end portion of the vibration transmitting member, and the holding tool being attached to the other end of the vibration transmitting member for holding the electronic component, and
wherein the hole portion and the heating unit are placed in a proximity of the other end of the vibration transmitting member at which the holding tool is attached.
12. The electronic component mounting apparatus according to claim 11 , wherein the heating unit is an electrothermal heater, and
wherein a gap of not less than 7.5 μm and not more than 100 μm is provided between a surface of the heater and an inner surface of the hole portion.
13. The electronic component mounting apparatus according to claim 11 , wherein the supporter supports the component holding unit only at a nodal portion of vibrations of the component holding unit by the ultrasonic transducer.
14. The electronic component mounting apparatus according to claim 11 , further comprising a thermometer for measuring temperature of the component holding unit or temperature of an electronic component held by the component holding unit, the thermometer being arranged in a non-contact state with the component holding unit.
15. The electronic component mounting apparatus according to claim 11 , further comprising a thermocouple, which is inserted into a hole portion formed in the component holding unit, for measuring temperature of the component holding unit, the thermocouple being arranged in a non-contact with the component holding unit.
16. An electronic component mounting head for use in an electronic component mounting apparatus for mounting an electronic component onto a circuit board with use of an ultrasonic wave, the electronic component mounting head comprising:
a component holding unit for holding the electronic component;
a supporter to which the component holding unit is attached;
a heating unit, which is fixed to the supporter in non-contact state with the component holding unit, for applying radiant heat so as to heat the electronic component in a state of being held by the component holding unit; and
an ultrasonic transducer for applying ultrasonic vibrations to the electronic component via the component holding unit,
wherein the component holding unit has a hole portion into which the heating unit is inserted,
wherein the heating unit is held by the supporter in a state of being inserted in the hole portion without coming into contact with an inner surface of the hole portion,
wherein the component holding unit comprises a vibration transmitting member and a holding tool, the vibration transmitting member having the hole portion formed therein and being arranged so as to extend in parallel to a direction of vibrations of the component holding unit by the ultrasonic transducer, the heating unit being inserted in the hole portion and the ultrasonic transducer being attached at one end portion of the vibration transmitting member, and the holding tool being attached to the other end of the vibration transmitting member for holding the electronic component, and
wherein the hole portion and the heating unit are placed in a proximity of the other end of the vibration transmitting member at which the holding tool is attached.