Light-emitting chip holder with multiple pads pairs, and light-emitting device

1 . A light-emitting chip holder, comprising:

a conductive base, wherein the conductive base comprises a plurality of pad pairs spaced along a first direction, each pad pair of the plurality of pad pairs comprises a connection pad and a bonding pad spaced along a second direction, the second direction is different from the first direction, the connection pad comprises a main portion, an extension portion and a first protruding portion, and the bonding pad comprises a first bonding portion, a second bonding portion and a second protruding portion; and

a casing, disposed on the conductive base and forming at least one concave group, wherein the at least one concave group each comprises a first concave and a second concave adjacent to each other in the second direction;

wherein the plurality of pad pairs comprises a first pad pair and a second pad pair adjacent to each other; for the first pad pair, the main portion is located in the first concave, the extension portion is connected to the main portion and extends into the second concave along the second direction, the first bonding portion is located in the second concave and adjacent to the extension portion in the second direction, and the second bonding portion connected to a side of the first bonding portion facing toward the second pad pair; and in the concave group, the first pad pair and the second pad pair are arranged in a centrosymmetric manner;

wherein for the first pad pair, the first protruding portion is connected to the main portion, the first protruding portion extends facing away from the extension portion in the second direction and exceeding a circumferential edge of the casing and thereby is exposed out of the casing;

wherein for the first pad pair, the second protruding portion is connected to another side of the first bonding portion facing away from the second pad pair, the second protruding portion extends in the second direction exceeding the circumferential edge of the casing and thereby is exposed out of the casing.

2 . The light-emitting chip holder according to claim 1 , wherein a number of the plurality of pad pairs is four, and a number of the at least one concave group is two; the first pad pair and the second pad pair in each of the two concave groups serve as one pad group, two the pad groups are arranged with the same orientation along the first direction.

3 . The light-emitting chip holder according to claim 1 , wherein the concave group has a first bottom edge and a second bottom edge opposite to each other in the first direction, the first bottom edge is located on a side of the first pad pair facing away from the second pad pair, a distance between the first bottom edge and the second bottom edge is a concave bottom width, a distance from an edge of the bonding pad of the first pad pair facing towards the second pad pair to the first bottom edge is a first bonding width, and the first bonding width is greater than ½ of the concave bottom width.

4 . The light-emitting chip holder according to claim 3 , wherein a distance from an edge of the second bonding portion of the first pad pair facing away from the second pad pair to the first bottom edge is a second bonding width, and the second bonding width is greater than ⅓ of the concave bottom width and smaller than ½ of the concave bottom width.

5 . The light-emitting chip holder according to claim 1 , wherein the second concave has a concave bottom connected with the conductive base, and an area of the bonding pad connected with the concave bottom, of the first pad pair is greater than or equal to 40% of an area of the concave bottom.

6 . A light-emitting device, comprising:

the light-emitting chip holder according to claim 1 ; and

light-emitting chips, electrically connected to the conductive base, wherein each of the first concave and the second concave of the concave group is disposed the light-emitting chip therein.

7 . The light-emitting device according to claim 6 , wherein a number of the plurality of pad pairs is four, and a number of the at least one concave group is two; the first pad pair and the second pad pair in each of the two concave groups serve as one pad group, two the pad groups are arranged with the same orientation along the first direction.

8 . The light-emitting device according to claim 6 , wherein the concave group has a first bottom edge and a second bottom edge opposite to each other in the first direction, the first bottom edge is located on a side of the first pad pair facing away from the second pad pair, a distance between the first bottom edge and the second bottom edge is a concave bottom width, a distance from an edge of the bonding pad of the first pad pair facing towards the second pad pair to the first bottom edge is a first bonding width, and the first bonding width is greater than ½ of the concave bottom width.

9 . The light-emitting device according to claim 8 , wherein a distance from an edge of the second bonding portion of the first pad pair facing away from the second pad pair to the first bottom edge is a second bonding width, and the second bonding width is greater than ⅓ of the concave bottom width and smaller than ½ of the concave bottom width.

10 . The light-emitting device according to claim 6 , wherein the second concave has a concave bottom connected with the conductive base, and an area of the bonding pad connected with the concave bottom, of the first pad pair is greater than or equal to 40% of an area of the concave bottom.

11 . The light-emitting device according to claim 6 , wherein the light-emitting chips comprise a first light-emitting chip disposed in the first concave and a second light-emitting chip disposed in the second concave; two electrodes of the first light-emitting chip are electrically connected to the connection pad and the bonding pad of the second pad pair, respectively; and two electrodes of the second light-emitting chip are electrically connected to the connection pad and the bonding pad of the first pad pair.

12 . The light-emitting chip holder according to claim 1 , wherein for the second pad pair, the main portion is located in the second concave, the extension portion is connected to the main portion and extends into the first concave along the second direction, the first bonding portion is located in the first concave and adjacent to the extension portion in the second direction, and the second bonding portion connected to a side of the first bonding portion facing toward the first pad pair;

wherein for the second pad pair, the first protruding portion is connected to the main portion, the first protruding portion extends facing away from the extension portion in the second direction and exceeding the circumferential edge of the casing and thereby is exposed out of the casing;

wherein for the second pad pair, the second protruding portion is connected to another side of the first bonding portion facing away from the first pad pair, the second protruding portion extends in the second direction exceeding the circumferential edge of the casing and thereby is exposed out of the casing.

13 . The light-emitting chip holder according to claim 1 , wherein for the first pad pair, the connection pad is a one-piece structure and penetrates from a front surface of the conductive base facing towards the casing to a rear surface of the conductive base facing away from the casing, the bonding pad is a one-piece structure and penetrates from the front surface of the conductive base facing towards the casing to the rear surface of the conductive base facing away from the casing;

wherein for the second pad pair, the connection pad is a one-piece structure and penetrates from the front surface of the conductive base facing towards the casing to the rear surface of the conductive base facing away from the casing, the bonding pad is a one-piece structure and penetrates from the front surface of the conductive base facing towards the casing to the rear surface of the conductive base facing away from the casing.

14 . The light-emitting device according to claim 6 , wherein the light-emitting chips comprise a first light-emitting chip disposed in the first concave and a second light-emitting chip disposed in the second concave, the first light-emitting chip is secured on the bonding pad of the second pad pair, and the second light-emitting chip is secured on the bonding pad of the first pad pair.

15 . A light-emitting chip holder, comprising:

a conductive base, wherein the conductive base comprises a plurality of pad pairs arranged at intervals along a first direction, and each pad pair of the plurality of pad pairs comprises a connection pad and a bonding pad arranged at an interval along a second direction different from the first direction; and

a casing, disposed on the conductive base and forming a plurality of concave groups on a side of the conductive base, wherein the plurality of concave groups is spaced in the first direction, and each of the plurality of concave groups comprises a first concave and a second concave adjacent to each other in the second direction;

wherein the plurality of pad pairs comprises a first pad pair and a second pad pair adjacent to each other, and the first pad pair and the second pad pair together serve as one set of pad pairs;

wherein the one set of pad pairs has two the connection pads and two the bonding pads, the two connection pads and the two bonding pads are separated from one another and are one-piece structures respectively, the two bonding pads are configured to bear light-emitting chips respectively, one of the two connection pads is exposed in both the first concave and the second concave, the other one of the two connection pads is exposed in both the first concave and the second concave, and each of the two bonding pads is exposed in one of the first concave and the second concave but not exposed in the other one of the first concave and the second concave;

wherein each of the two connection pads extends in the second direction exceeding a circumferential edge of the casing and intersecting with the circumferential edge of the casing, and thereby is partially exposed out of the casing;

wherein each of the two bonding pads extends in the second direction exceeding the circumferential edge of the casing and intersecting with the circumferential edge of the casing, and thereby is partially exposed out of the casing.

16 . The light-emitting chip holder according to claim 15 , wherein each of the two bonding pads partially extends into an overlapped region of the two connection pads observed along the first direction.

17 . The light-emitting chip holder according to claim 15 , wherein each of the two connection pads and the two bonding pads outwardly extends across the circumferential edge of the casing.

18 . The light-emitting chip holder according to claim 15 , wherein the connection pad comprises a main portion and an extension portion, and the bonding pad comprises a first bonding portion and a second bonding portion;

for the first pad pair, the main portion is located in the first concave, the extension portion is connected to the main portion and extends into the second concave along the second direction, the first bonding portion is located in the second concave and adjacent to the extension portion in the second direction, and the second bonding portion connected to a side of the first bonding portion facing toward the second pad pair;

for the second pad pair, the main portion is located in the second concave, the extension portion is connected to the main portion and extends into the first concave along the second direction, the first bonding portion is located in the first concave and adjacent to the extension portion in the second direction, and the second bonding portion connected to a side of the first bonding portion facing toward the first pad pair.

19 . The light-emitting chip holder according to claim 18 , wherein each of the plurality of concave groups has a first bottom edge and a second bottom edge opposite to each other in the first direction, the first bottom edge is located on a side of the first pad pair facing away from the second pad pair, a distance between the first bottom edge and the second bottom edge is a concave bottom width, a distance from an edge of the bonding pad of the first pad pair facing towards the second pad pair to the first bottom edge is a first bonding width, and the first bonding width is greater than ½ of the concave bottom width.

20 . The light-emitting chip holder according to claim 19 , wherein a distance from an edge of the second bonding portion of the first pad pair facing away from the second pad pair to the first bottom edge is a second bonding width, and the second bonding width is greater than ⅓ of the concave bottom width and smaller than ½ of the concave bottom width.