R

Electrical Requirements

Figure 4-4. Inductance Measurement Fixture Cross-Section

Probing Pads Surface

40 mils

Interposer

No Features or Plane

 

 

on this Layer

Socket

Interposer Pin

 

Motherboard

No Plane on this Layer

 

Short all L pins (using a solid plane)

Full Plane on this Layer

 

No Features or

Plane on this Layer

Interposer

Interposer Shoulder

Short all L pins (using a solid plane)

Motherboard

Figure 4-5. Inductance and Capacitance Fixture

A

B 1

AC

4

 

5

 

 

8

AD

 

 

 

2

3

6

7

 

 

1 2

 

 

2930

4.3.1 Design Procedure for Inductance Measurements

The measurement equipment required to perform the validation is:

1.Equipment - HP8753D Vector Network Analyzer or equivalent.

2.Robust Probe Station (GTL4040) or equivalent.

3.Probes - GS1250 & GSG1250 Air-Co-Planar or equivalent.

mPGA604 Socket Design Guidelines

25