# US 2013/0154680 A1 · Signal transmission lines with test pad

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- Number: US 2013/0154680 A1
- Document ID: US20130154680A1
- Status: Published application
- Kind: A1
- Application number: 13/711,415
- Filed: 2012-12-11
- Published: 2013-06-20
- Earliest claimed: 2011-12-20
- Assignees: Hon Hai Precision Industry Co., Ltd.
- Inventors: YU-HSU LIN
- Web page: https://patentgrep.com/patent/US20130154680A1

## CPC

- G01R 1/067: Measuring probes
- H04B 3/46: Monitoring; Testing
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H04B: TRANSMISSION

## Abstract

A pair of signal transmission lines includes an aggressor line, a victim line, a first test pad, and a second test pad. The first test pad is in the aggressor line. The victim line is parallel to the aggressor line. A second test pad is in the victim line. The first test pad, on the aggressor line, is misaligned with the second test pad, on the victim line, to reduce the incidence and amplitude of any crosstalk generated.

## Claims

### Claim 1

A pair of signal transmission lines, comprising:
an aggressor line;
a first test pad linked in the aggressor line;
a victim line parallel to the aggressor line; and
a second test pad linked in the victim line;
wherein the first test pad, on the aggressor line, is misaligned with the second test pad, on the victim line.

### Claim 2 (depends on 1)

The pair of signal transmission lines of claim 1, wherein length of each of the aggressor line and the victim line is h; the aggressor line comprises a first aggressor line end and a second aggressor line end; the victim line comprises a first victim line end in alignment with the first aggressor line end of the aggressor line, and a second victim line end in alignment with the second aggressor line end of the aggressor line; the aggressor line is placed parallel to a one dimension coordinate axis with the first aggressor line end in alignment with a zero point of the coordinate axis, and the first test pad and the second test pad have different coordinate values.

### Claim 3 (depends on 2)

The pair of signal transmission lines of claim 2, wherein two not-negative values, a and b, satisfy the following equation: a+b=h/2, a first test pad coordinate value is a, and a second test pad coordinate value pad is h−b.

### Claim 4 (depends on 3)

The pair of signal transmission lines of claim 3, wherein each of the two not-negative values, a and b, is equal to h/4.

### Claim 5 (depends on 1)

The pair of signal transmission lines of claim 1, wherein the first test pad and the second test pad have a same delay time.

### Claim 6 (depends on 5)

The pair of signal transmission lines of claim 5, wherein delay times of the first test pad and the second test pad are smaller than a rise time of a signal transmitted on the aggressor line.

### Claim 7 (depends on 1)

The pair of signal transmission lines of claim 1, wherein the first test pad and the second test pad are same type of test pads.

### Claim 8

A pair of signal transmission lines, comprising:
an aggressor line with a first test pad linked therein; and
a victim line with a second test pad linked therein;
wherein the first test pad and the second test pad have a same delay time, and the first test pad on the aggressor line is malpositioned with the second test pad on the victim line.

### Claim 9 (depends on 8)

The pair of signal transmission lines of claim 8, wherein length of each of the aggressor line and the victim line is h, the aggressor line comprises a first aggressor line end and a second aggressor line end, the victim line comprises a first victim line end in alignment with the first aggressor line end of the aggressor line, and a second victim line end in alignment with the second aggressor line end of the aggressor line; the aggressor line is placed parallel to a one dimension coordinate axis with the first aggressor line end in alignment with a zero point of the coordinate axis, and the first test pad and the second test pad have different coordinate values.

### Claim 10 (depends on 9)

The pair of signal transmission lines of claim 9, wherein two not-negative values, a and b, satisfy the following equation: a+b=h/2, a first test pad coordinate value is a, and a second test pad coordinate value is h−b.

### Claim 11 (depends on 10)

The pair of signal transmission lines of claim 10, wherein each of the two not-negative values, a and b, is equal to h/4.

### Claim 12 (depends on 8)

The pair of signal transmission lines of claim 8, wherein delay times of the first test pad and the second test pad are smaller than a rise time of a signal transmitted on the aggressor line.

### Claim 13 (depends on 8)

The pair of signal transmission lines of claim 8, wherein the first test pad and the second test pad are same type of test pads.