Patent ID: 7449907

Claim:
A test unit to test a board having an area array package mounted thereon, the test unit comprising: the board; the area array package comprising: an electronic component, a plurality of package pins including a plurality of contact pins connected with the electronic component and a plurality of no-contact pins not connected with the electronic component, and a plurality of contact members respectively provided on the plurality of contact pins and the plurality of no-contact pins to connect the plurality of package pins with the board; a plurality of board contact parts provided on the board and connected with the plurality of contact members to be connected with the plurality of package pins; at least one first connection part provided in the area array package to electrically connect the plurality of no-contact pins with each other in pairs; at least one second connection part provided on the board to electrically connect the plurality of board contact parts with each other in pairs to form a circuit line arranged alternately with the first connection part through the plurality of contact members; and at least one test point provided at opposite ends of the circuit line to measure a resistance between the first and second connection parts.