PCB Manufacturing Process

PCB (Printed Circuit Board) is an important electronic components, is the support of electronic components, electronic components are electrically connected to the carrier. Because it is electronic printing production, it is called "printed" circuit board. 10 steps will be introduced firstly as follows:

1. CCL cutting

1) When the substrate feed production, according to the manufacturer will design drawings good crop; different manufacturers Depending on the product, the size also varies;

2) Technical features: automatic cutting equipment, semi-automatic cutting

3) Management Focus: Dimensions control; measured before and after each class member first confirmation of production; when the substrate type conversion, measurement confirmed;

4) CCL Size: 1200mm × 1000mm, 1000mm × 1000mm

2. Pre-treatment (Prepare treatment)

1) Drill hole cleaning pollution;

2) Oil with an alkaline solution to remove the copper surface, fingerprints and other organic contaminants; then with an acidic solution to remove the copper surface oxide layer; and finally micro-etching process to obtain a full roughened surface with a dry film with excellent adhesion properties ;

C. Management Focus: medicine management, the scheduled inspection;

3. Paste dry film (Lamination)

1) Stickers need to dry clean room operations (PCB board manufacturers cleanroom level is generally 10 000), the operator need to wear anti-static clothing, wearing a cap and anti-static anti-static gloves;

2) dry film attached to the plate, after exposure, after development, so that the basic shape lines, mainly dry in this process played a role in the transfer of the image, but also played a role in the process of protection lines etched in; (to high temperature and pressure with a laminator photosensitive dry film is attached to the copper surface of the substrate, as a medium of image transfer)

3) Management Focus

Kept dry and clean board; dry location can not be deflected, not wrinkle, the need for copper clad laminate surface with a roller cleaning when attaching dry;

4. The inner exposure (Exposure)

1) Need to work in a clean room (clean room level is generally 10 000), the operator need to wear anti-static cap and wear anti-static clothing, indoor temperature and humidity need to be managed;

2) cannot use exposure Films deviation, general plant equipment using automatic alignment; not a foreign body and dust between the film and the substrate sheet, dry;

3) Operating principle: irradiated with UV light to the film when the media cover, without cover part of the polymerization reaction with a dry film for image transfer;

4) Exposure apparatus: Semi-automatic exposure machine, automatic exposure machine;

5. The developer (Develop)

Principle of operation: section dilute alkali solution reaction with unexposed photographic film is dissolved, and the exposed portion of the dry film is retained