MIL- STD-883F 2004 TEST METHOD STANDARD MICROCIRCUITS - 第175页

MIL-STD-883F METHOD 1034.1 18 June 2004 1 METHOD 1034.1 DYE PENETRANT TEST 1. PURPOSE . This method tes ts t he capab ility of a P lastic Enca psulate d Microcircuit (P EM) to wi thst and moist ure ingres s and to det ec…

MIL-STD-883F

METHOD 1033

29 May 1977

4. SUMMARY

. The following details shall be specified in the applicable acquisition document:

a. Number of write/erase cycles, n.

b. Data retention bake conditions, including duration and temperature.

c. Electrical test case temperature and timing conditions.

d. Requirements for preconditioning, if applicable, and procedure if different than in 3.

e. Cycle conditions including temperature, type (e.g., block, byte, or bit) and write/erase pulse duration and repetition

rate.

f. The sample plan including number of devices to be cycled and acceptance number.

g. End-point and interim electrical test criteria.

MIL-STD-883F

METHOD 1034.1

18 June 2004

METHOD 1034.1

DYE PENETRANT TEST

1. PURPOSE

. This method tests the capability of a Plastic Encapsulated Microcircuit (PEM) to withstand moisture

ingress and to detect flaws in packaging materials.

2. APPARATUS

. The apparatus for the Dye Penetrant test shall be as follows.

a. Protective absorbant mats (paper/plastic)

b. 2 2000 ml containers

c. 2 1000 ml beakers

d. 2 mixing magnets

e. 2 hot plates for mixing

f. Whatman 42 filters (0.005µ)

g. 500 ml funnel

h. Fisher bell jar with stopper

i. Filtration base with vacuum accessories (fisher allied filtrator #9-788 11 cm base)

j. Vacuum pump, hoses, and clamps

k. 15 ml beaker

l. 50 ml beaker

m. 2 250 ml beakers

n. Watchglass or evaporating dish

o. Petri dish

p. Drummond 0.1 ml pipettes and plunger

q. Graduated cylinder

r. Vacuum oven

s. Heating oven

t. B1 filter / polyvar (or olympus PMG3 inverted microscope)

u. 52 film - 400 ASA

v. 57 film - 3000 ASA

3. PROCEDURES

. The following procedures shall be followed in performing the Dye Penetrant test. This technique

utilizes a low viscosity, anaerobic liquid penetrant (Resinol) which is mixed with a fluorescent powder (Yellow Dye G) and a

anaerobic accelerator (17724).

NOTE: These chemicals are skin, eye and nose irritants.

MIL-STD-883F

METHOD 1034.1

18 June 2004

3.1 Dye penetration procedure outline

a. Mix dye solution.

Loctite Resinol RTC 18018

Loctite Accelerator for PMS 17724

Morton Fluorescent Yellow G

Note: Solutions with an established or verifiable equivalent makeup and performance may be used.

b. Place the parts in a beaker of the dye solution.

c. Place the beaker in the vacuum oven.

d. Leave the beaker for 15 minutes at a vacuum of 1 to 0.3 torr.

e. Bring the vacuum oven back to atmospheric pressure, then wait 15 minutes.

f. Remove the parts from the dye solution.

g. Wipe off the parts to remove the excess dye.

h. Heat the parts in the oven at 100°C for 1 hour to harden the polymer mixture.

i. Mount the parts for crosssectioning.

j. Crosssection the parts.

k. View the parts under magnification.

l. Take an optical photo of the crosssection.

m. Take a photo of the crosssection under UV to document the depth of penetration.

NOTE: Lay down a double layer of protective mats before starting this procedure. The dye spreads and stains quite

easily. Be sure to wear the appropriate protective apparel, which includes chemical gloves, goggles, and a lab

coat.

3.1.1 PREMIX solution preparation

. Prepare a stock solution (PREMIX solution) of the resinol and yellow dye.

3.1.1.1 Mixing the solution

. A mixture of 100 parts resinol to 1 part yellow dye powder is required to make the PREMIX

solution.

a. Measure and pour 2000 ml of resinol into a beaker.

b. Measure 20 g of yellow dye and pour it into the 2000 ml of resinol. Stir this mixture for 5 minutes, then separate

the mixture into two 1000 ml beakers to make it easier to work with. Place a mixing magnet in each of the

beakers, then place the beakers on mixing plates. Stir the mixtures for two to three hours.

3.1.1.2 Filtering the PREMIX

. The PREMIX must be filtered to ensure that any undesolved particles are removed from

the solution.

a. Take a WHATMAN 42 filter and place it in the 11 cm Buckner funnel. Place the funnel adapter on the stem of the

funnel. Then place the funnel into the top of the bell jar. Place a 250 ml beaker on the bell jar base. Place the

bell jar and funnel over the beaker on the bell jar base.

b. Turn on the vacuum pump.