Jedec_permanent_marking

JEDEC STANDARD Marking Permanency JESD22-B107C (Revision of JESD22-B107B) SEPTEMBER 2004 JEDEC SOLID STATE TECHNOLOGY ASSOCIATION

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JEDEC Standard No. 22-B107C Page 1

Test Method B107C (Revision of Test Method B107B)

MARKING PERMANENCY

(From JEDEC Board Ballot JCB-03-35 and JCB-04-81, formulated under the cognizance of the JC-14.1 Subcommittee on Reliability Test Methods for Packaged Devices.)

1 Scope

The tests mentioned herein are applicable for all package types. They are suitable for use in qualification and/or process monitor testing. The mechanical shear test (tape test) is recommended as an ongoing process monitor or lot acceptance test. Electrical or mechanical rejects may be used for these tests. NOTE 1 This procedure does not apply to laser marked packages. NOTE 2 The formulation of solvents herein is considered typical and representative of the desired stringency as far as the usual coatings and markings are concerned. Many available solvents that could be used are either insufficiently active, too stringent, or even dangerous to humans when in direct contact or when the fumes are inhaled. NOTE 3 These tests should be considered a destructive test unless determined to be non destructive by previous evaluation. The purpose of this test is to determine whether the markings on solid state semiconductor devices will remain legible when subjected to the application and removal of labels or the use of solvents and cleaning solutions commonly used during the removal of solder flux residue from the printed circuit board manufacturing process.

2 References

Mil-Std-883, Method 2015, Resistance to Solvents. ASTM D3359-95A, Standard Test Methods for Measuring Adhesion by Tape Test.



3 Terms and definitions

For the purpose of this specification, the following terms and definitions apply:

3.1 Solvent solution “A” A mixture consisting of the following:

1) One part by volume of isopropyl alcohol, ACS. (American Chemical Society) reagent grade,

or isopropyl alcohol according to TT-1-735, grade A or B, and 2) Three parts by volume of mineral spirits according to TT-T-291, type 11, grade A, or three

parts by volume of a mixture of 80% by volume of kerosene and 20% by volume of ethylbenzene maintained at a temperature of 20 °C to 30 °C.

3.2 Solvent solution “B” A semi-aqueous based solvent, (defluxer) e.g., a terpene, aliphatic hydrocarbons, high molecular weight alcohols, etc., or any equivalent EPA (Environmental Protection Agency) approved, HCFC (Hydrochlorofluorocarbon), terpene or demonstrated equivalent maintained at a temperature of 20 °C to 30 °C. (Reference item 5 in section 6.) 3.3 Solvent solution “C” At 63 °C to 70 °C, a mixture consisting of the following: 1) 42 parts by volume of deionized water. 2) One part by volume of propylene glycol monomethyl ether (laboratory reagent grade). 3) One part by volume of monoethanolamine (laboratory reagent grade). NOTE Normal safety precautions for handling this solution (e.g., same as those for diluted ammonium hydroxide) based on OSHA (Office of Safety & Health Administration). Rules for monethanolamine or other precautionary measures with regard to flash point, toxicity, etc. 3.4 Brush The brush shall be a toothbrush with a handle made of a nonreactive material. The brush shall have at least three long rows of hard bristles, the free ends of which shall lie substantially in the same plane. The toothbrush shall be used exclusively with a single solvent and when there is any evidence of softening, bending, wear, or loss of bristles, it shall be replaced.



3 Terms and definitions (cont’d) 3.5 Adhesive tape Physical properties

Total Thickness (mils) 2.4

Elongation (%) 20

Tensile (lb/in) 25

Adhesion (oz/in) 25-50

Application Temperature (deg) 60-131 °F (10-55 °C) Electrical Properties (Required only to make the test nondestructive)

Static Charge Generation, volts (73 oF, 50%RH)

Roll Strip <50

Plate Strip <50 Surface Resistivity (ohms/square)

ASTM D-257 5x109

ESD 11.11 5x108 Charge Decay Time, seconds [FTMS 4046 (101c)] <0.1 NOTE Examples of adhesive tapes that meet these requirements are: 3M Scotch® part numbers 10144-179 through 10144-183, or Wescorp WATP Series adhesive tapes. 3M Scotch® Magic Tape part number 806 does not meet the electrical characteristics to be nondestructive due to potential ESD damage, but can be used as a destructive test.

3 Equipment

Three brushes as defined in 3.4. Three containers (beakers), a minimum of 400 – 500 ml (one pint) in size, each made from nonreactive materials such as stainless steel, naldene, or pyrex. An explosion-proof hot plate capable of maintaining solvent C at the temperature defined in 3.5.



4 Safety precautions

Solvent solutions listed in this document exhibit some potential health, environment, and safety hazards. The following safety requirements and precautions are to be followed at all times. a) Always work under a well-vented hood. Avoid inhalation of vapors at all times.

b) Safety glasses/eye protection and solvent-resistant gloves must be worn at all times while performing this test.

c) Solutions are to be kept in covered vessels at all times when not in direct use.

d) Avoid contact with skin or eyes, and exposure to open flames or hot surfaces.

e) When using EPA approved alternative solutions for test the device manufacturer should consider the recommended temperature for cleaning specified by the solvent supplier.

6 Procedures

6.1 Solvents Test 1) Label the three vessels, three brushes, and three tweezers, A, B, and C. Divide the test

specimens into three equal groups and fill the three vessels with the appropriate solutions A, B, and C respectively.

2) Each test group, along with a brush, shall be totally immersed for one minute in each of the solutions.

3) At the end of the exposure time, the specimens shall be removed from each solution and brushed with normal pressure for ten strokes in a forward direction on the portion of the specimen where marking has been applied with the brush specified above. The brush stroke for solvent-resistance testing is with normal hand pressure, approximately 57 to 85 grams (2 – 3 ounces).

4) At the conclusion of the brushing, place the devices and the brush back into the vessel of the appropriate solution.

5) Repeat the procedure above until a total of three immersions and brushings have occurred.

6) Following the third immersion and brushing, rinse the specimens with deionized water, place them on a clean surface, and allow them to dry at room temperature for a minimum of five minutes before inspection.



6 Procedure (cont’d) 6.2 Tape Pull Test 1) Obtain marked devices and ensure the ink has been cured. The parts should be at room

temperature and the surfaces should be clean and dry.

2) Place devices marking side up onto the conductive foam mat to provide ESD protection.

3) Remove the tape from the dispenser at a continuous rate as opposed to jerking the tape. The amount of tape should be sufficient to cover the marked area of the device.

4) Place the tape over the marked portion of one device.

5) Use firm finger pressure to ensure that the entire surface of the marked area is in contact with the tape. Ensure all bubbles are removed from under the tape.

NOTE If the entire surface of the marked area is not covered, then use two pieces of tape.

6) Lift the tape off the device in one continuous pull at approximately 2 cm/s and at approximately a 90° angle to the device under test.

7) Observe the mark on the device to see if any portion of the mark came off with the tape.

8) Repeat Section 6.2 again for a total of 3 times. (Also see 7.2)

7 Failure criteria

7.1 Solvents Test After subjection to the test, evidence of damage to the device and any specified markings that are missing in whole or part, faded, smeared, blurred, or shifted (dislodged) to the extent that they cannot be readily identified from a distance of at least 15 centimeters (6 inches) with normal room lighting and without the aid of magnification or with a viewer having a magnification of no greater than 3x shall constitute a failure. 7.2 Tape Pull Test The Tape Pull Test must be done three times on each device before determining whether the “Mark Permanency Test” passed or failed. The devices are to be examined from a distance of at least 15 centimeters (6 inches) with normal room lighting and without the aid of magnification. If none of the marking on the device comes off after three tape pulls on all devices, the devices have passed.



8 Summary

The following details shall be specified in the applicable procurement document:

• The number of parts to be tested and the acceptance number. • Any exceptions or changes from standard procedure that are required for a particular device



Annex A (informative) Differences between JESD22-B107C and JESD22-B107B

This table briefly describes most of the changes made to entries that appear in this standard, JESD22-B107C, compared to its predecessor, JESD22-B107B (January 2004). If the change to a concept involves any words added or deleted (excluding deletion of accidentally repeated words), it is included. Some punctuation changes are not included. Page Description of change 1 Purpose changes to Scope to conform with JM7, JEDEC Style Manual. 1 Following removed from 1st paragraph: “since it is non-destructive for devices that

are not ESD sensitive, and quick to perform”. 1 2nd to last sentence in 1st paragraph removed and became Note 3. 3 1st paragraph place at end of tape properties as a note. 3 Change value of Adhesion (oz/in) in Physical properties from 40 to 25-50. 3 In note: Added Information on 3M Scotch® Magic Tape part number 806

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