PURPOSE: To provide a detergent capable of simultaneously removing ions and a resin contained in the residue of soldering flux by using at least a given amt. of a glycol ether compd. represented by a specific formula.
CONSTITUTION: A glycol ether compd. of formula I (wherein k, l and m are each 1 to 10) or II (wherein k is 1 to 2; l is 2 to 4; and m is 1 to 3), such as diethylene glycol monobutyl ether [C4H9-(O-C2H4)2-OH], is mixed with water in such an amt. that the glycol ether compd. accounts for at least 50wt.% of the resulting detergent with high safety. Subsequently, a printed board subjected to soldering treatment wherein use is made of a rosin soldering flux is immersed in the detergent for a prescribed period of time, irradiated with ultrasonic waves, etc., and then taken up to confirm effective simultaneous removal of ions and a resin contained in the residue of the soldering flux without any adverse effects on electronic components on the board.
| JPS58221665 | PRELIMINARY SOLDERING METHOD OF PARTS |
| JP2018115818 | REFRIGERATOR |
| JP6709822 | Soldering equipment |
SHINODA KENICHI
YAMAGATA YOSHIKAZU
SHIMIZU TOKIHIKO
