GB/T 17473.5-2008Test methods of precious metals pastes used for microelectronics -- Determination of viscosity (English PDF)

Foreword

This standard is an integrated revision of GB/T 17473-1998 " Test methods of

precious metal pastes used for thick film microelectronics" (all parts). It is

divided into 7 parts:

- GB/T 17473.1-2008 Test methods of precious metals pastes used for

microelectronics - Determination of solids content;

- GB/T 17473.2-2008 Test methods of precious metals pastes used for

microelectronics - Determination of fineness;

- GB/T 17473.3-2008 Test methods of precious metals pastes used for

microelectronics - Determination of sheet resistance;

- GB/T 174743.4-2008 Test methods of precious metals pastes used for

microelectronics - Determination of adhesion;

- GB/T 174743.5-2008 Test methods of pastes used for microelectronics -

Determination of viscosity;

- GB/T 174743.6-2008 Test methods of precious metal pastes used for

microelectronics - Determination of resolution;

- GB/T 174743.7-2008 Test methods of precious metals pastes used for

microelectronics - Determination of solderability and solderleaching

resistance.

This Part is Part 5 of GB/T 17473-2008.

This part replaces GB/T 17473.5-1998 "Test methods of precious metal pastes

used for thick film microelectronics - Determination of viscosity".

Compared with GB/T 17473.5-1998, this Part mainly has the following changes:

- CHANGE the original standard name into "Test methods of precious metals

pastes used for microelectronics - Determination of viscosity";

- In the Scope of the original standard, DELETE the content that "the

determination of viscosity of non-precious metal pastes can also be

implemented with reference to this standard";

- ADD the determination by the use of cone/plate viscometer, which is

suitable for use when there are few samples.

This Part was proposed by China Nonferrous Metals Industry Association.

Test methods of precious metals pastes used for

microelectronics - Determination of viscosity

1 Scope

This Part specifies the determination method for the viscosity of precious metal

pastes, which are used in microelectronics technology.

This Part applies to the determination of the viscosity of precious metal pastes,

for microelectronics technologies.

2 Normative references

The provisions in following documents become the provisions of this Part

through reference in this Part. For the dated references, the subsequent

amendments (excluding corrections) or revisions do not apply to this Part;

however, parties who reach an agreement based on this Part are encouraged

to study if the latest versions of these documents are applicable. For undated

references, the latest edition of the referenced document applies.

GB/T 8170 Rules of rounding off for numerical values & expression and

judgement of limiting values

3 Method principle

The test shaft of the rotary viscometer rotates in a constant temperature paste,

at a certain speed. The viscosity of the paste is determined by measuring the

torque, which is caused by the viscous resistance. When there are few samples,

a cone/plate viscometer is used to measure the torque and shear stress, which

is caused by the viscous resistance of the paste, at a constant temperature, to

determine the viscosity of the paste.

4 Instruments and equipment