JPS60174965A - Method of testing heat impact on printed circuit board - Google Patents

Abstract

PURPOSE:To enable decision on the reliability of a through hole connection in a short time by immersing a printed circuit board in a cooling water before the immersion thereof in a water draining liquid. CONSTITUTION:A printed circuit board 1 is immersed into a cooling water tank 5 and then, into a hot oil tank 4. When a heat impact test is performed by repeating this immersion work through an automatic moving mechanism 7, the printed circuit board 1 is immersed into a water draining liquid tank 6 between immersions into the tanks 5 and 4. This draining method is not mechanical using an air blower or the like but by immersing the printed circuit board 1 into a chemical liquid (draining liquid) lower in the dissolvability for water and larger in the specific weight than water to remove water drops. This can simplify the equipment while enabling decision on the reliability in the through hole connection of a multilayer printed circuit board, multi-wire circuit board and the like in a short time.

Description

[Detailed description of the invention] (Use in tumor! 1f) Misfire #! Arx, inspired by the heat @ impact test method of printed wiring boards (prior technology) Through-hole connection roughness test of printed wiring boards, heat resistance test, etc. Thermal shock test ε MIL-8TD-202E-1
Performed using 07D test method, hot oil test method, etc.
〇Through hole connection 1 [Sensitivity test σ] This is a method of measuring and adding up the connection resistance value between the through hole and the inner layer or surface conductive pattern to be connected, and is often used as a simple method for plating lot test IIR etc. The hot oil test was carried out as shown below.
0 seconds) In this test, the water bottle was attached to the 7X cold-shun provisional specimen, and the
If the oil gets into the tank, there is a danger of a big earthquake that will cause the oil to scatter.For this reason, water +? This method of draining water was done gradually using an air blower, etc., as shown in Figure 1. In Figure 1, there are 16 temporary test pieces, 2 is water IM layered on the test piece, 6U is an air blower that blows 1K of this water, and 4 is
Indicates hot oil M, SRR water J4 0 When this method is used on the floor, it prevents the oil from being mixed into the oil shell of the water bottle that scatters, and the 1 dimension of the stile of the construction floor equipment is similar to the temple equipment force S, and the test equipment is also high. It becomes one song.

(Purpose of the invention) To provide a method for testing the thermal value of a board (invented by Sakaki b51.) The present invention 1'J printed wiring board is subjected to cold water treatment (hot oil immersion). In the method of testing the legs for practice, immerse them in cold water, soak them in hot oil, and then print them before soaking them in hot oil. It is an amnesty to compensate Kitamoto's large water drain vc from the water.

(S) Don't do it frugally using an air blower, etc., instead of doing it sparingly using an air blower or the like, and have someone who has a special order that has a large specific gravity and low vulnerabilities. This is what makes the boat beautiful.

As a cumulative definition, a, the common understanding of water ##, is more than 1% T'''
P, the ratio is 1.2 or more or the weather is good 〇 Also, the reason for water draining is that the evaporation rate is fast, the next bending tension is small (?i
Is it something like: +1N property or good), small withering marks (good property), flammability does not have a ``t's toxicity, does not give the test softness (corrosion property is not good), etc. Preferably, a commercially available product of this kind is σ1 Magic Dry (Daikin-E Tokuyaku product name).

Dai20nlubento (same), Fronsolp (Asahi Glass)
&1 song product name), Freon (Mitsui Kaji ■ song product name) Terakameru.

The specimens to be tested that are used in this invention include single-open and double-sided, multi-layer printed WM, σ in similar and historical patterns, and wiring in which insulated wire is used for the gland distribution pattern.

The wiring pattern uses S5 edge wire and 1ζ wiring (multi-wire wiring temporary) is a leading edge substrate such as a thermosetting resin laminate that is coated with a TL & hardened charcoal injection shielding agent that retains the heat resistance during cloth removal. The number Ill 1lf is the number Ill 1lf of
The heat resistance of polyimide resin, etc. is 4M due to lJ Gofu sl.
Wire the loquat edge turtle moth (wire), which has been tln with fat, into a cloth, press it into a ppm wire, and use the end of the wire to cut the wire.
(Cut the wire kut@'a: I'm so happy. I connected the cut end of the wire to the inner wall of the through hole. By Suru Ko-ru Komakura 18
A trial smoke was made to see if the heat resistance of the rice cracker, the heat resistance of the porcelain pattern, and the heat resistance of the loquat-like pattern were tested.

Example stamp Al1Ii Temporary through hole fitting Peach plating completed & 1 as a quick determination method IL-5T I
J-202E-107D) *When IM171"Kuru sleeping power a = hot oil KM! 0 Is this device a delivery rice?: I took an air-70 arca type t and 1 kettle for draining the drainer. The equipment was made into a leap year l automatic tester by using chemical water treatment (manufactured by Daikine Co., Ltd. - product name: Masic Dry).This equipment is shown in Figure 2. How many layers were added to 21'!-trL on the test piece, 4a hot oil information, 5 water hate, 6 shows Magic Dry Europe, and 07 shows the constant oval that automatically moves the test piece.This stock The 7ζ hot oil testing device is equipped with a 7ζ hot oil testing device, and is effectively used for multi-thread board testing and through-hole injection testing of multilayer printed dispatch boards.

You can get through it in a short time by using this kesa pot.

The product can be quickly delivered to each customer because the product has good color stability and can be quickly delivered to each customer. 〇 (@ Ming Dynasty) As explained above, by using the trial method of the present invention as a raw material for Mr. 7C, the effect of rice can be improved. I was able to quickly deliver a product with a -F4J construction and a 1D concession to the customer in a short period of 1 DJ time during a busy period of 1 DJ for the Marunay Year E-4S Gin wiring machine.

(2) Don't drain the water for cooling slowly.

By adopting the method of immersing in Kajishin, it is easy to use and easy to use, and is very safe.

[Brief explanation of the drawing]

Fig. 1 is a congratulatory drawing showing the conventional method, and Fig. 2 is a perspective view showing the non-invention method. Explanation of codes 14!1 Trial piece 2 Water 1III 6 Air Proa 4 Hot oil hate 5 Water = 6
Magic Dry Inn 7th IM Moving Image Procedural Amendment (Voluntary) Commissioner of the Japan Patent Office 1, Indication of Case 1982 Patent Application No. 61820 2, Name of Invention TIIP of Printed Wiring 11i, Weight Testing Method 3, Amendment Relationship with the case of a person who does
People (30 excerpts) #Water NC 20 excerpts)” Toa 4) fr260±
5℃ (10 seconds) 4:! Mine marriage (60 seconds) mouth water drunkenness (20 episodes) and blindness.

Claims (1)

[Scope of Claims] 1. In a method for thermal impact testing of printed wiring boards, which involves rinsing the printed wiring board with cold water, followed by IL, and then hot oil, followed by fRt,
Cold water & Tsukeshun, before the hot oil role is destroyed, Mark J11J distribution MJ
The i-board has a low level of vulgarity towards water, and is characterized by the following characteristics: a water cutter with a higher specific gravity than water. 1% or less, and the specific gravity is 1.2 or more.