Semiconductor light-receiving device
AssigneeSumitomo Electric Device Innovations, Inc.
InventorYuji Koyama
Life of this patent
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Abstract
A semiconductor light-receiving device includes two lenses; and a concave region, a height of the sidewall being higher than a top of the lenses, a distance between a position H and a lower edge of the sidewall vertical to a line segment C1 being grater than following condition: {(r+L)2−(W/2)2}1/2 where: C1 is a line segment connecting centers of the lenses; H is a midpoint of the C1; r is a radius of the lenses; W is an interval between the centers; and C2 is a lines passing through the centers in a direction vertical to the C1, wherein: the lower edge of the concave portion in an outer side of a region between the C2 is concentrically formed so as to have a distance of (r+L) from the center of the lenses; and W is following condition: W<2 (r+L).
Claims12
A semiconductor light-receiving device comprising:
- two lenses provided on a semiconductor substrate;
- and
- a concave region surrounding the two lenses,
- a sidewall positioned along an edge of the concave region having an upper edge and a lower edge,
- a height of the sidewall being higher than a top of the lenses,
- a distance between a position H and the lower edge of the sidewall in a direction vertical to a line segment C1 being grater than following condition (1):
- {(r+L)2−(W/2)2}1/2 (1)
- where:
- C1 is a line segment connecting centers of the two lenses;
- H is a midpoint of the line segment C1;
- r is a radius of the lenses;
- W is an interval between the centers of the two lenses;
- and
- C2 is a lines passing through the centers of the lenses in a direction vertical to the line segment C1,
- wherein;
- the lower edge of the concave portion in an outer side of a region between the lines C2 is concentrically formed so as to have a distance of (r+L) from the center of the lenses;
- and
- W is following condition (2):
- W<2(r+L) (2).
An optical semiconductor device comprising:
- a semiconductor substrate having an upper face and a lower face;
- an active region provided on a side of the upper face of the substrate;
- two lenses provided on a side of the lower face of the substrate;
- and
- a concave region surrounding the two lenses,
- a sidewall positioned along an edge of the concave region having an upper edge and a lower edge,
- a height of the sidewall being higher than a top of the lenses,
- a distance between a position H and the lower edge of the sidewall in a direction vertical to a line segment C1 being grater than following condition (1):
- {(r+L)2−(W/2)2}1/2 (1)
- where:
- C1 is a line segment connecting centers of the two lenses;
- H is a midpoint of the line segment C1;
- r is a radius of the lenses;
- W is an interval between the centers of the two lenses;
- and
- C2 is a lines passing through the centers of the lenses in a direction vertical to the line segment C1,
- wherein:
- the lower edge of the concave portion in an outer side of a region between the lines C2 is concentrically formed so as to have a distance of (r+L) from the center of the lenses;
- and
- W is following condition (2):
- W<2(r+L) (2).
Dependencies are inferred from the claim text.