Semiconductor device including a coupling conductor having a concave and convex
View Patent ↗While a semiconductor device is provided with a plurality of element electrodes 5 formed on a semiconductor element 4 and a plurality of lead terminal electrodes 6 formed on a lead frame, the semiconductor device is equipped with a coupling conductor which electrically connects at least one electrode among the above-described element electrodes 5 to at least one electrode among the above-described lead terminal electrodes 6 ; the above-described coupling conductor is manufactured by a first conductor 1 and a second conductor 2 , the major components of which are metals; the first conductor 1 has been electrically connected to the second conductor 2 ; and the element electrodes 5 and the lead terminal electrodes 6 have been electrically connected to the second conductor 2 respectively.
1. A semiconductor device, comprising:
a semiconductor substrate on which a desirable element region and an element electrode have been formed;
a lead portion having a plurality of leads; and
a coupling conductor electrically connecting said element electrode to a lead of said lead portion, said lead corresponding to said element electrode,
wherein said coupling conductor is comprised of at least a first conductor, and a second conductor extending from said element electrode to said lead portion,
the second conductor is provided on a surface of the first conductor,
said first conductor has been formed by a material whose major component is copper, and
said second conductor has a concave and a convex on at least portions of a surface of said second conductor positioned at said element electrode and said lead portion, and on at least a portion of the surface of said second conductor positioned between said element electrode and said lead portion.
2. The semiconductor device as claimed in claim 1 , wherein the coupling conductor has been formed by a first conductor and a second conductor stacked on said first conductor at the region which abuts against at least either said element electrode or said lead.
3. The semiconductor device as claimed in claim 1 , wherein said second conductor has been formed by a material whose major component is aluminium.
4. The semiconductor device as claimed in claim 1 , wherein said second conductor contains at least one sort of a metal selected from aluminium, silver, gold, nickel, and titanium.
5. The semiconductor device as claimed in claim 1 , wherein said first conductor has a curved plane.
6. The semiconductor device as claimed in claim 1 , wherein said coupling conductor has been divided into a plurality of sub-divided coupling conductors.
7. The semiconductor device as claimed in claim 1 , wherein the second conductor is formed over an entire surface of one side of the first conductor.
8. The semiconductor device as claimed in claim 7 , wherein said second conductor has been formed by a material whose major component is aluminium.
9. The semiconductor device as claimed in claim 7 , wherein said second conductor contains at least one sort of a metal selected from aluminium, silver, gold, nickel, and titanium.
10. The semiconductor device as claimed in claim 7 , wherein said first conductor has a curved plane.
11. The semiconductor device as claimed in claim 7 , wherein said coupling conductor has been divided into a plurality of sub-divided coupling conductors.
12. A semiconductor device, comprising:
a semiconductor substrate on which a desirable element region and an element electrode have been formed;
a lead portion having a plurality of leads; and
a coupling conductor electrically connecting said element electrode to a lead of said lead portion, said lead corresponding to said element electrode,
wherein said coupling conductor is comprised of at least a first conductor, and a second conductor extending from said element electrode to said lead portion,
the first conductor has been formed by a material whose major component is copper,
the second conductor is provided on a surface of the first conductor,
at least portions of the first conductor positioned at said element electrode and said lead portion, and at least a portion of the first conductor positioned between said element electrode and said lead portion, are exposed from the second conductor.
13. The semiconductor device as claimed in claim 12 , wherein the coupling conductor has been formed by a first conductor and a second conductor stacked on said first conductor at the region which abuts against at least either said element electrode or said lead.
14. The semiconductor device as claimed in claim 12 , wherein said second conductor has been formed by a material whose major component is aluminium.
15. The semiconductor device as claimed in claim 12 , wherein said second conductor contains at least one sort of a metal selected from aluminium, silver, gold, nickel, and titanium.
16. The semiconductor device as claimed in claim 12 , wherein said first conductor has a curved plane.
17. The semiconductor device as claimed in claim 12 , wherein said coupling conductor has been divided into a plurality of sub-divided coupling conductors.