GB/T 17473.5-2008 English PDF (GBT17473.5-2008)

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GB/T 17473.5-2008: Test methods of precious metals pastes used for microelectronics -- Determination of viscosity
GB/T 17473.5-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.99
H 68
Replacing GB/T 17473.5-1998
Test methods of precious metals pastes used for
microelectronics - Determination of viscosity
ISSUED ON: MARCH 31, 2008
IMPLEMENTED ON: SEPTEMBER 01, 2008
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Method principle ... 5 
4 Instruments and equipment... 5 
5 Specimen ... 6 
6 Measurement steps ... 6 
7 Description of measurement results ... 7 
8 Test report ... 7 
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 and 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
4.1 Rotatory viscometer: The measurement error is within ±2%.
4.2 Cone/plate viscometer: The measurement error is within ±2%.
4.3 Thermometer: The division value is 0.1 °C.