Lead frame

Patent metadata

Field	Value
Publication number	US-10079201-B1
Application number	US-201815924071-A
Country	US
Kind code	B1
Filing date	Mar 16, 2018
Priority date	Mar 17, 2017
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

A lead frame includes: a plurality of units each including a first lead portion and a second lead portion arranged in a first direction, wherein the units are arranged in the first direction and in a second direction perpendicular to the first direction, and the first lead portion and the second lead portion of each unit are adjacent, in the second direction, to the first lead portion and the second lead portion of an adjacent one of the units that is adjacent in the second direction; a plurality of first suspension portions; and a plurality of connecting portions. Each of the first suspension portions connects, in the second direction, the first lead portions of units that are adjacent to each other in the second direction.

First claim

What is claimed is:

1. A lead frame comprising:
a plurality of units each including a first lead portion and a second lead portion arranged in a first direction, wherein the units are arranged in the first direction and in a second direction perpendicular to the first direction, and the first lead portion and the second lead portion of each unit are adjacent, in the second direction, to the first lead portion and the second lead portion of an adjacent one of the units that is adjacent in the second direction;
a plurality of first suspension portions; and
a plurality of connecting portions,
wherein each of the first suspension portions connects, in the second direction, the first lead portions of units that are adjacent to each other in the second direction,
wherein each of the connecting portions connects the first lead portion of a corresponding one of the units and the second lead portion of an adjacent one of the units that is adjacent to the corresponding one of the units in the first direction, and
wherein the second lead portion of each of the units is connected to the first lead portion of the adjacent one of the units only via the connecting portion.

2. The lead frame according to claim 1 , wherein:
the first suspension portions are arranged in the first direction and in the second direction,
the lead frame further comprises a plurality of support portions, and
each of the support portions connects a corresponding one of the first suspension portions arranged in the first direction with only one of two first suspension portions that are adjacent to the corresponding one of the first suspension portions on the both sides of the corresponding one of the first suspension portions in the first direction.

3. The lead frame according to claim 2 , wherein the support portions are connected only to even-numbered rows of the first suspension portions in the second direction or only to odd-numbered rows of the first suspension portions in the second direction.

4. The lead frame according to claim 2 , wherein the support portions are arranged in a staggered pattern in the first direction and the second direction.

5. The lead frame according to claim 1 , wherein:
the first suspension portions are arranged in the first direction and in the second direction,
the lead frame further includes a plurality of support portions including a plurality of first support portions and a plurality of second support portions,
where m and n each represents an integer of 0 or greater,
each of the first support portions is connected only to a (2m+1) th one and a (2m+2) th one of the first suspension portions that are arranged in the first direction along (4n+1) th first suspension portions in the second direction; and
each of the second support portions is connected only to a (2m+2) th one and a (2m+3) th one of the first suspension portions that are arranged in the first direction along a (4n+3) th first suspension portions in the second direction.

6. The lead frame according to claim 5 , wherein the support portions are not connected to the first suspension portions that are arranged in the first direction along a (4n+2) th first suspension portion and a (4n+4) th first suspension portion in the second direction.

7. The lead frame according to claim 1 , wherein the lead frame has a substantially rectangular shape that is elongated in the first direction when viewed from above.

8. The lead frame according to claim 2 , wherein a part of an upper surface of the first suspension portion, a part of an upper surface of the connecting portion and a part of an upper surface of the support portion are at a higher position than a position of upper surface of main body portion of each of the first lead portion and the second lead portion.

9. The lead frame according to claim 1 , wherein a width of the connecting portion along the second direction is greater than a width of the first suspension portion along the first direction when viewed from above.

10. The lead frame according to claim 1 , wherein each of the units further includes a third lead portion arranged between the first lead portion and the second lead portion.

11. The lead frame according to claim 10 , wherein:
the lead frame further comprises a plurality of second suspension portions; and
each of the second suspension portions connects, in the second direction, the third lead portions of adjacent ones of the units that are adjacent to each other in the second direction.

Assignees

• Nichia Corp

Inventors

• Oku Hironao
• Hashimoto Toshiyuki
• Isono Mitsuhiro
• Ishihara Takao
• Kato Takaaki

Classifications

• H10W90/756

  between a chip and a stacked lead frame, conducting package substrate or heat sink · CPC title

• H10W74/016

  using moulds · CPC title

• H10W72/884

  Die-attach connectors and bond wires · CPC title

• H10W72/0198

  batch processes · CPC title

• H10W70/04

  of leadframes · CPC title