Intel Pentium 4 Processor on 90 nm Process Thermal and Mechanical Design Guidelines

Appendix E: TTV Metrology
R
80 Intel
®
Pentium
®
4 on 90 nm Process Thermal Design Guide
TTV Correction Factors for Intel
®
Pentium
®
4 Processor on 90 nm
Process
Thermal characterization parameter measurements made with a thermal test vehicle must be
corrected for the non-uniform power dissipation of actual processors. Table 10 provides
correction factors for using a Pentium 4 processor on 90 nm process TTV to assess the thermal
characterization parameter of Pentium 4 processor on 90 nm process heatsinks. The value of a
thermal characterization parameter is derived from the value measured on the TTV and the
corresponding correction factor according to equation:
{Processor Ψ
CA
} = {TTV Ψ
CA
} x Correction factor
This formula can be applied to Ψ
CS
and Ψ
SA
measurements as well.
Table 10. Intel
®
Pentium
®
4 Processor on 90 nm Process TTV Correction Factors
Thermal Characterization
Parameter
Correction factor using Intel
®
Pentium
®
4
Processor on 90 nm Process TTV
Ψ
CS
1.103
Ψ
SA
1.006
Ψ
CA
1.030
Note: The Ψ
CS
and Ψ
SA
correction factors should be used whenever possible since the Ψ
CA
correction
factor is based on the Intel reference solution and depend on the TIM used. The Ψ
CA
correction
factor provided should be used only when the ratio of Ψ
CS
to Ψ
SA
is ~0.32.