PCB新聞 - 一般PCB設計圖紙檢查項目

全體的 印刷電路板設計 drawing inspection items

1) Has the circuit been analyzed? 為了平滑訊號, 電路分為基本單元.
2) Does the circuit allow short or isolated key leads?
3) Where must be shielded, 是否有效遮罩?
4) Have you made full use of the basic grid graphics?
5) Is the size of the printed 電路板 最佳尺寸?
6) Do you use the selected wire width and spacing as much as possible?
7) Has the preferred pad size and hole size been used?
8) Are the photographic plates and sketches appropriate?

9）跨接導線的使用是否更少？ 跨接導線是否穿過部件和附件？

l0）組裝後字母是否可見？ 它們的尺寸和型號正確嗎？

11) In order to prevent blistering, 大面積銅箔上有窗戶嗎?
12) Are there tool positioning holes?
印刷電路板 electrical characteristics inspection items:
1) Have you analyzed the influence of wire resistance, 電感, 和電容, 特別是地面臨界電壓降的影響?
2) Does the spacing and shape of the wire accessories meet the insulation requirements?
3) Has the insulation resistance value been controlled and specified in key areas?
4) Is the polarity fully recognized?
5) Is the influence of wire spacing on leakage resistance and voltage measured from a geometrical point of view?
6) Has the medium for changing the surface coating been identified?
印刷電路板 physical characteristics inspection items:

1) Are all pads and their positions suitable for final 裝配?
2) Can the assembled printed 電路板 滿足衝擊和振動條件?
3) What is the required spacing of standard components?

4）安裝不牢固的部件或較重的部件是否固定？

5) Is the heating element heat dissipation and cooling correct? 還是與印刷品隔離 電路板 和其他熱敏元件?
6) Are the voltage divider and other multi-lead components positioned correctly?
7) Is the arrangement and orientation of the components easy to check?
8) Has it eliminated all possible interference on the printed 電路板 整個印刷品 電路板 assembly?
9) Is the size of the positioning hole correct?
10) Is the tolerance complete and reasonable?
11) Have you controlled and signed the physical properties of all coatings?
12) Is the diameter ratio of the hole and the lead wire within the acceptable range?
印刷電路板 mechanical design factors:
Although the printed 電路板 採用機械方法支撐部件, 它不能用作整個設備的結構部分. 印版邊緣, 至少每5英寸一次，以獲得一定的支撐力. 選擇和設計印刷品時必須考慮的因素 電路板s are as follows;
1) The structure of the printed 電路板-尺寸和形狀.
2) Types of mechanical accessories and plugs (seats) required.
3) The adaptability of the circuit to other circuits and environmental conditions.