Electronic component placing apparatus and electronic component mounting method

An electronic component placing apparatus for placing an electronic component with a plurality of solder bumps formed on a lower surface on a board, comprising:

• a component supply section for supplying said electronic component;
• a board holding section for holding and positioning said board;
• a placing head for taking the electronic component out of said component supply section and placing said electronic component on the board held in said board holding section;
• head movement means for moving said placing head between said component supply section and the board holding section;
• a paste transfer unit, disposed on a movement path of said placing head, for transferring the solder paste to a plurality of solder bumps by forming a film of solder paste to be transferred to said solder bumps on a film formation face and causing the electronic component held in said placing head to descend to said film formation face;
• a control section for controlling said paste transfer unit;
• and
• a paste transfer information library that stores, for each kind of electronic component, the paste transfer information including the component warp information indicating a state of warp deformation in a reflow process of said electronic component, a paste transfer pattern indicating a film thickness distribution for transferring a desired transfer amount of solder paste according to said state of warp deformation to said plurality of solder bumps, and the squeegee movement data for causing a squeegee to perform a film formation operation of combining the horizontal movement and the vertical movement on said film formation face in said paste transfer unit to implement said film thickness distribution;
• wherein said control section controls a squeegee drive section for driving said squeegee to perform said film formation operation, based on the identification result of said electronic component and the paste transfer information read from said paste transfer information library, to form a film having a film thickness distribution for transferring a desired transfer amount of solder paste according to said state of warp deformation in said electronic component to each of said plurality of solder bumps in said paste transfer unit.

An electronic component mounting method for placing and mounting an electronic component with a plurality of solder bumps formed on a lower surface on a board for use in an electronic component placing apparatus comprising:

• a component supply section for supplying said electronic component;
• a board holding section for holding and positioning said board;
• a placing head for taking the electronic component out of said component supply section and placing said electronic component on the board held in said board holding section;
• head movement means for moving said placing head between said component supply section and the board holding section;
• a component warp information storage section for storing the component warp information indicating a state of warp deformation in a reflow process of said electronic component;
• a paste transfer unit, disposed on a movement path of said placing head, for forming a film of solder paste to be transferred to said solder bumps on a film formation face with a squeegee that performs a film formation operation of combining the horizontal movement and the vertical movement on said film formation face;
• and a control section for controlling said paste transfer unit;
• the electronic component mounting method comprising:
• a step of taking the electronic component out of said component supply section with the placing head;
• a paste transfer step of transferring the solder paste to said solder bumps by causing the electronic component held in said placing head to descend to said film formation face in said paste transfer unit;
• and
• a component placing step of placing said electronic component on said board to cause said solder bumps to land via said solder paste on the electrodes of said board;
• wherein film formation operation performed before said paste transfer step, said control section controls a squeegee drive section for driving said squeegee based on said component warp information to form the film having a film thickness distribution for transferring a desired transfer amount of solder paste according to said state of warp deformation in said electronic component to each of said plurality of solder bumps.

An electronic component mounting method for placing and mounting an electronic component with a plurality of solder bumps formed on the lower surface on a board for use in an electronic component placing apparatus comprising:

• a component supply section for supplying said electronic component;
• a board holding section for holding and positioning said board;
• a placing head for taking the electronic component out of said component supply section and placing said electronic component on the board held in said board holding section;
• head movement means for moving said placing head between said component supply section and the board holding section;
• a paste transfer unit, disposed on a movement path of said placing head, for forming a film of solder paste to be transferred to said solder bumps on a film formation face with a squeegee that performs a film formation operation of combining the horizontal movement and the vertical movement on said film formation face;
• and a control section for controlling said paste transfer unit;
• and a paste transfer information library that stores, for each kind of electronic component, the paste transfer information including the component warp information indicating a state of warp deformation in a reflow process of said electronic component, a paste transfer pattern indicating a film thickness distribution for transferring a desired transfer amount of solder paste according to said state of warp deformation to said plurality of solder bumps, and the squeegee movement data for causing the squeegee to perform the film formation operation of combining the horizontal movement and the vertical movement on said film formation face in said paste transfer unit to implement said film thickness distribution;
• the electronic component mounting method comprising:
• a step of taking the electronic component out of said component supply section with the placing head;
• a paste transfer step of transferring the solder paste to said solder bumps by causing the electronic component held in said placing head to descend to said film formation face in said paste transfer unit;
• and
• a component placing step of placing said electronic component on said board to cause said solder bumps to land via said solder paste on the electrodes of said board;
• wherein in said film formation operation performed before said paste transfer step, said control section controls a squeegee drive section for driving said squeegee based on the identification result of said electronic component and the paste transfer information read from said paste transfer information library to form the film having a film thickness distribution for transferring a desired transfer amount of solder paste according to said state of warp deformation in said electronic component to each of said plurality of solder bumps.