# US 9,437,526 B2 · Chip on film package including distributed via plugs

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- Number: US 9,437,526 B2
- Document ID: US9437526B2
- Status: Granted
- Kind: B2
- Application number: 14/259,200
- Filed: 2014-04-23
- Published: 2014-11-06
- Granted: 2016-09-06
- Earliest claimed: 2013-05-06
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: So-Young Lim; Na-Rae Shin; Jeong-Kyu Ha; Kyoung-Suk Yang; Pa-Lan Lee
- Web page: https://patentgrep.com/patent/US9437526B2

## CPC

- H10W 70/421: {Shapes or dispositions}
- H05K 1/118: {specially for flexible printed circuits, e.g. using folded portions}
- H10W 20/484: {Interconnections having extended contours, e.g. pads having mesh shape or interconnections comprising connected parallel stripes}
- H10W 70/65: Shapes or dispositions of interconnections
- H10W 70/688: {Flexible insulating substrates}
- H10W 99/00: Subject matter not provided for in other groups of this subclass
- H10W 90/724: {between a chip and a stacked insulating package substrate, interposer or RDL}
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A chip on film (COF) package includes a film substrate, first leads on a first surface of the film substrate, the first leads having a first length, and second leads on the first surface of the film substrate, the second leads having a second length larger than the first length, first via plugs penetrating the film substrate and connected to first ends of the first leads, and second via plugs penetrating the film substrate and connected to first ends of the second leads, and first connection leads on a second surface of the film substrate facing the first surface, the first connection leads having first ends connected to the first via plugs, and second connection leads on the second surface of the film substrate, the second connection leads having first ends electrically connected to the second via plugs.

## Claims

### Claim 1

A chip on film (COF) package, comprising:
a film substrate;
first leads on a first surface of the film substrate, the first leads having a first length, and second leads on the first surface of the film substrate, the second leads having a second length larger than the first length;
first via plugs penetrating the film substrate and connected to first ends of the first leads, and second via plugs penetrating the film substrate and connected to first ends of the second leads; and
first connection leads on a second surface of the film substrate facing the first surface, the first connection leads having first ends connected to the first via plugs, and second connection leads on the second surface of the film substrate, the second connection leads having first ends electrically connected to the second via plugs.

### Claim 2 (depends on 1)

The COF package as claimed in claim 1, further comprising a semiconductor chip on the first surface of the film substrate, the semiconductor chip being electrically connected to second ends of the first leads and second ends of the second leads.

### Claim 3 (depends on 2)

The COF package as claimed in claim 2, wherein the first ends of the first leads are relatively close to the semiconductor chip, and the first ends of the second leads are relatively far from the semiconductor chip.

### Claim 4 (depends on 2)

The COF package as claimed in claim 2, wherein the first via plugs are relatively close to the semiconductor chip, and the second via plugs are relatively far from the semiconductor chip.

### Claim 5 (depends on 2)

The COF package as claimed in claim 2, wherein:
the first connection leads extend from the first via plugs to an opposite direction of the semiconductor chip, and
the second connection leads extend from the second via plugs toward the semiconductor chip.

### Claim 6 (depends on 5)

The COF package as claimed in claim 5, wherein the first connection leads and the second connection leads are parallel to each other between the first via plugs and the second via plugs.

### Claim 7 (depends on 5)

The COF package as claimed in claim 5, wherein:
the first connection leads extend to pass between the second via plugs, and
the second connection leads extend to pass between the first via plugs.

### Claim 8 (depends on 1)

The COF package as claimed in claim 1, wherein the first leads and the second leads are parallel to each other between the first via plugs and the second via plugs on the second surface of the film substrate.

### Claim 9 (depends on 1)

The COF package as claimed in claim 1, further comprising:
first pads at second ends of the first connection leads; and
second pads at second ends of the second connection leads.

### Claim 10 (depends on 1)

The COF package as claimed in claim 1, wherein the first connection leads or the second connection leads have bending portions.

### Claim 11 (depends on 1)

The COF package as claimed in claim 1, wherein:
the first via plugs form an imaginary first straight line,
the second via plugs form an imaginary second straight line, and
the first straight line and the second straight line are parallel to each other.

### Claim 12

A chip on film (COF) package, comprising:
a film substrate;
a semiconductor chip on a first surface of the film substrate;
first leads on the first surface of the film substrate, the first leads extending from the semiconductor chip to a first length to have first ends;
second leads on the first surface of the film substrate, the second leads extending from the semiconductor chip to a second length larger than the first length to have first ends;
first via plugs penetrating the film substrate and connected to the first ends of the first leads, and second via plugs penetrating the film substrate and connected to the first ends of the second leads;
first connection leads on a second surface of the film substrate facing the first surface, the first connection leads having first ends connected to the first via plugs; and
second connection leads disposed on the first surface of the film substrate, the second connection leads being electrically connected to the first ends of the second leads.

### Claim 13 (depends on 12)

The COF package as claimed in claim 12, further comprising third connection leads on the second surface of the film substrate, the third connection leads being connected to the second via plugs.

### Claim 14 (depends on 13)

The COF package as claimed in claim 13, wherein the third connection leads extend from the second via plugs toward the semiconductor chip.

### Claim 15 (depends on 13)

The COF package as claimed in claim 13, wherein the first connection leads and the third connection leads are parallel to each other in a region between the first via plugs and the second via plugs on the second surface of the film substrate.

### Claim 16

A film of a chip on film (COF) package, the film comprising:
a film substrate;
first leads on a first surface of the film substrate, the first leads extending from a semiconductor chip and having a first length;
second leads on the first surface of the film substrate, the second leads extending from the semiconductor chip having a second length longer than the first length;
first via plugs penetrating the film substrate and connected to first ends of the first leads;
second via plugs penetrating the film substrate and connected to the second leads;
first connection leads on a second surface of the film substrate facing the first surface, the first connection leads having first ends connected to the first via plugs and second ends that form first pads on the second surface, the first connection leads extending from the first via plugs in a direction toward the semiconductor chip; and
second connection leads on the second surface of the film substrate, the second connection leads having first ends electrically connected to the second via plugs and the second connection leads extending in an opposite direction from the semiconductor chip.

### Claim 17 (depends on 16)

The film as claimed in claim 16, wherein the second connection leads include second ends that form second pads on the second surface.

### Claim 18 (depends on 16)

The film as claimed in claim 16, wherein second leads extend on the first surface from the semiconductor chip to beyond the second via plugs and terminate in second pads on the first surface.