Semiconductor chip including alignment pattern

Patent metadata

Field	Value
Publication number	US-11145601-B2
Application number	US-201916430630-A
Country	US
Kind code	B2
Filing date	Jun 4, 2019
Priority date	Oct 23, 2018
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A semiconductor chip including an alignment pattern is provided. The semiconductor chip includes a substrate associated with a main chip region of a semiconductor wafer and including a scribe lane. A lower interlayer insulating layer is disposed on the substrate, a low-K layer including dummy metal patterns is disposed on the lower interlayer insulating layer, an alignment pattern is disposed on the low-K layer, and a passivation layer covers the alignment pattern.

First claim

What is claimed is:

1. A semiconductor chip comprising:
a substrate associated with a main chip region of a semiconductor wafer and including a scribe lane;
a lower interlayer insulating layer disposed on the substrate;
a low-K layer including dummy metal patterns disposed on the lower interlayer insulating layer;
an alignment pattern disposed on the low-K layer; and
a passivation layer at least partially covering the alignment pattern.

2. The semiconductor chip of claim 1 , wherein the alignment pattern is disposed between the dummy metal patterns in a lengthwise direction of the scribe lane.

3. The semiconductor chip of claim 2 , wherein a shortest distance between the dummy metal patterns and the alignment pattern is not greater than 8 μm.

4. The semiconductor chip of claim 1 , wherein the dummy metal patterns include a first lower dummy pattern and a second lower dummy pattern, and
an uppermost end of the dummy metal patterns is at substantially the same level as an uppermost end of the low-K layer.

5. The semiconductor chip of claim 4 , further comprising an upper interlayer insulating layer disposed between the low-K layer and the passivation layer,
wherein the dummy metal patterns further include a first upper dummy pattern extending through the upper interlayer insulating layer and in contact with an uppermost end of a lower dummy pattern including the first lower dummy pattern and the second lower dummy pattern.

6. The semiconductor chip of claim 5 , wherein the dummy metal patterns further include a second upper dummy pattern disposed on the upper interlayer insulating layer and having a lower end in contact with the first upper dummy pattern.

7. The semiconductor chip of claim 1 , wherein the scribe lane comprises an alignment key region in which the alignment pattern is disposed, a dummy pad region in which the dummy metal patterns are disposed, and an open region configured to expose a top surface of the lower interlayer insulating layer and a side surface of the low-K layer.

8. The semiconductor chip of claim 7 , wherein the open region comprises a first open region formed on one side of each of the dummy metal patterns and a second open region formed between the dummy metal pattern and the alignment pattern.

9. The semiconductor chip of claim 1 , wherein the passivation layer comprises a first insulating layer in contact with the alignment pattern, a second insulating layer disposed on the first insulating layer, and a third insulating layer disposed on the second insulating layer.

10. The semiconductor chip of claim 9 , wherein the first insulating layer and the third insulating layer include oxide, and the second insulating layer includes nitride.

11. A semiconductor chip comprising:
a substrate associated with a main chip region of a semiconductor wafer and including a scribe lane surrounding the main chip region;
a lower interlayer insulating layer disposed on the substrate;
an alignment key structure including a low-K layer disposed on the lower interlayer insulating layer in the scribe lane, an upper alignment pattern disposed on the low-K layer, and a passivation layer disposed on the upper alignment pattern; and
dummy pattern structures including a low-K pattern disposed on the lower interlayer insulating layer and a lower dummy pattern disposed in the low-K pattern and disposed on at least one side surface of the alignment key structure.

12. The semiconductor chip of claim 11 , wherein one side surface of the alignment key structure and one side surface of the dummy pattern structure face each other in a lengthwise direction of the scribe lane, and contact one another.

13. The semiconductor chip of claim 11 , wherein the alignment key structure is spaced apart from the dummy pattern structure in a lengthwise direction of the scribe lane.

14. The semiconductor chip of claim 11 , wherein a shortest distance between the lower dummy pattern and the alignment key structure is not greater than 8 μm.

15. The semiconductor chip of claim 11 , wherein the dummy pattern structure further comprises an upper interlayer insulating pattern disposed on the low-K pattern and a passivation pattern disposed on the upper interlayer insulating pattern.

16. The semiconductor chip of claim 15 , wherein the dummy pattern structure further comprises a first upper dummy pattern extending through the upper interlayer insulating pattern, and a second upper dummy pattern disposed on the first upper dummy pattern,
wherein the first upper dummy pattern is in contact with each of the lower dummy pattern and the second upper dummy pattern.

17. The semiconductor chip of claim 11 , wherein the alignment key structure further comprises an upper interlayer insulating layer disposed between the low-K layer and the passivation layer, and a lower alignment pattern disposed in the upper interlayer insulating layer, the lower alignment pattern in contact with a lower end of the upper alignment pattern.

18. A semiconductor chip comprising:
a substrate associated with a main chip region of a semiconductor wafer and including a scribe lane;
a low-K layer configured to extend on the substrate along the scribe lane;
a lower dummy pattern disposed in the low-K layer;
a passivation layer disposed on the low-K layer;
an alignment pattern disposed in the passivation layer; and
an open region in which the low-K layer and the passivation layer are partially removed,
wherein the lower dummy pattern and the alignment pattern are spaced apart from one another in a lengthwise direction of the scribe lane.

19. The semiconductor chip of claim 18 , wherein a shortest distance between the lower dummy pattern and the alignment pattern is not greater than 8 μm.

20. The semiconductor chip of claim 18 , wherein a lower end of the alignment pattern is located at a higher level than a lower end of the lower.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Yoon Sung
• Kim Yun Hee
• Bae byung moon
• Sim Hyun Su
• Yoon Jun Ho
• Choi Jung Ho

Classifications

• H10W46/503

  Located in scribe lines · CPC title

• H10W46/301

  for alignment · CPC title

• H10W74/147

  the encapsulations being multilayered · CPC title

• H10W74/137

  the encapsulations being directly on the semiconductor body (H10W74/134 takes precedence) · CPC title

• H10W74/43

  comprising oxides, nitrides or carbides, e.g. ceramics or glasses · CPC title