The utility of PCBs is predicated largely on their own chemical stability, which includes lower flammability and substantial dielectric continuous. In an electric arc, PCBs generate incombustible gases.
絲網印刷：把預先設計好的電路圖制成絲網遮罩，絲網上不需要的電路部分會被蠟或者不透水的物料覆蓋，然後把絲網遮罩放到空白線路板上面，再在絲網上油上不會被腐蝕的保護劑，把線路板放到腐蝕液中，沒有被保護劑遮住的部份便會被蝕走，最後把保護劑清理。
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Enhancement in the solutions Utilized in fashionable printed circuit boards started out early in the twentieth century. In 1903, a German inventor, Albert Hanson, described flat foil conductors laminated to an insulating board, in multiple layers. Thomas Edison experimented with chemical methods of plating conductors on to linen paper in 1904.
电路板在使用中，应定期进行保养，以确保电路板工作在良好的状态和减少电路板的故障率。使用中的电路板的保养分如下几种情况：
感光板：把預先設計好的電路圖制在透光的膠片遮罩上（最簡單的做法就是用打印機印出來的投影片），同理應把需要的部份印成不透明的顏色，再在空白線路板上塗上感光顏料，將預備好的膠片遮罩放在電路板上照射強光數分鐘，除去遮罩後用顯影劑把電路板上的圖案顯示出來，最後如同用絲網印刷的方法一樣把電路腐蝕。
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With lowering measurement of board features and escalating frequencies, tiny nonhomogeneities like uneven distribution of fiberglass or other filler, thickness variations, and bubbles in the resin matrix, plus the involved nearby versions within the dielectric continual, are getting significance. Vital substrate parameters[edit]
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It is believed the incident resulted in the contamination of gasoline oil Utilized in a drying burner at one feed processor, with PCBs.
When vias using a diameter lesser than seventy six.two micrometers are expected, drilling with mechanical bits is unachievable due to high costs of put on and breakage. In this case, the vias could possibly be laser drilled—evaporated by lasers.
In 2013, the IARC established which the proof for PCBs triggering non-Hodgkin lymphoma is "minimal" and "not regular".[seventy one] In distinction an association between elevated blood amounts of PCBs and non-Hodgkin lymphoma were previously accepted.[seventy two] PCBs may Enjoy a job in the event of cancers with the immune program due to the fact some checks of laboratory animals subjected to extremely higher doses of PCBs have proven outcomes around the animals' immune program, and a few reports of human populations have described an Affiliation among environmental levels of PCBs and immune response.[four] Lawsuits relevant to health and fitness outcomes[edit]
PCBs have shown toxic and mutagenic outcomes by interfering with hormones in the human body. PCBs, depending upon the particular congener, are shown to the two inhibit and imitate estradiol, the most crucial sexual intercourse hormone in girls. Imitation of the estrogen compound can feed estrogen-dependent breast most cancers cells, and possibly bring about other cancers, such as uterine or cervical.
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