| US 7,550,673 B2 | ||
| Electrode pattern and wire bonding method | ||
| Yoshihiro Hisa, Tokyo (Japan); Tsutomu Yamaguchi, Tokyo (Japan); Hideyuki Tanaka, Tokyo (Japan); and Kazunori Matsuo, Nagasaki (Japan) | ||
| Assigned to Mitsubishi Electric Corporation, Tokyo (Japan) | ||
| Filed on Mar. 05, 2008, as Appl. No. 12/42,650. | ||
| Claims priority of application No. 2007-070684 (JP), filed on Mar. 19, 2007; and application No. 2008-008066 (JP), filed on Jan. 17, 2008. | ||
| Prior Publication US 2008/0230255 A1, Sep. 25, 2008 | ||
| Int. Cl. H01R 4/18 (2006.01) | ||
| U.S. Cl. 174—94R [257/738] | 8 Claims |
| 1. An electrode pattern for wire-bonding, comprising:
a shorter sideline;
a longer sideline;
a wire-bonding reference pattern indicating a reference position for determination of a wire-bonding position; and
a wire-bonding recognition pattern,
wherein the following relationships are satisfied,
L≧14.3(W−3d/4), and
Lb≤14.3(W−3d/4),
where
L indicates a distance between (i) the reference position and (ii) a line that is parallel with the shorter sideline of the
electrode pattern and passes through a position where a wire-bonding metal portion bonded to the electrode pattern has a maximum
width in a direction parallel with the shorter sideline of the electrode pattern,
Lb indicates a distance between (i) a line that passes through a center, in a direction parallel with the longer sideline
of the electrode pattern, of the wire-bonding recognition pattern and is parallel with the shorter sideline of the electrode
pattern and (ii) the line that is parallel with the shorter sideline of the electrode pattern and passes through the position
where the wire-bonding metal portion has the maximum width in the direction parallel with the shorter sideline of the electrode
pattern,
d indicates a maximum width of the wire-bonding metal portion bonded to the electrode pattern in the direction parallel with
the shorter sideline of the electrode pattern, and
W indicates a width of the electrode pattern in the direction parallel with the shorter sideline of the electrode pattern.
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