Browse Prior Art Database

Implementation of Turcite Precisors to Enable Stepped Lid Capability in IHSA

IP.com Disclosure Number: IPCOM000011426D
Publication Date: 2003-Feb-19
Document File: 3 page(s) / 101K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method that uses machined turcite presisor pins in place of the bearing assemblies on the Fuji QP-203 chuck in IHSA. Benefits include increased durability and greater ease of assembly.

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Implementation of Turcite Precisors to Enable Stepped Lid Capability in IHSA

Disclosed is a method that uses machined turcite presisor pins in place of the bearing assemblies on the Fuji QP-203 chuck in IHSA. Benefits include increased durability and greater ease of assembly.

Background

Currently, the precising arrangement on the Fuji QP-203 does not allow precising of stepped IHS lids. Current clearances prohibit accurate precising of the IHS thermal heat slug on the substrate surface.

General Description

Figure 1 shows the use of a single Turcite post versus a bearing assembly to provide the required accessibility to the stepped IHS lid for precising during the assembly process.

Advantages

The following are advantages of the disclosed method:

 

  • Accessibility to the stepped edge of the LGA lids.
  • The material is easily machined and extremely durable (see Table 1).
  • The material can be easily press fitted or threaded into place to allow greater ease of assembly.

Fig. 1


TYPICAL PROPERTIES of TURCITE ® TA and TX

ASTM or UL test

Property

Turcite ® TA

Turcite ® TX

PHYSICAL

D792

Density (lb/in³)
(g/cm³)

0.054
1.49

0.053
1.46

D570

Water Absorption, 24 hrs (%)

0.2

0.2

MECHANICAL

D638

Tensile Strength @ break (psi)

7,600

5,900

D638

Tensile Elongation at Break (%)

15

19

D790

Flexural Strength (psi)

11,000

8,000

D790

Flexural Modulus (psi)

350,000

335,000

D695

Compressive Strength (psi)

13,000

12,000

D785

Hardness, Rockwell

M81

M63

D256

IZOD Impact Notched (ft-lb/in)

0.57

0.54

THERMA...