Question:
to see those jobs say that to understand the priorities of PCB can be do not know what it is Dongdong. to know please help me. Thank you

Answer:
What is the PCB?
PCB or Printed Circuit Board abbreviated form of the Chinese name for the printed circuit board, also known as printed circuit boards, printed circuit boards, is an important electronic components, electronic components supporting body, is the electrical connection of electronic components provider . Because it is produced in electronic printing, it is called “printed” circuit boards.

PCB history
printed circuit board is the Austrian inventor Paul Eisler (Paul Eisler), he was in 1936 in a radio device used within the printed circuit boards. In 1943, Americans are a large number of the technology used in military radios inside. In 1948, the United States formally recognized the invention for commercial purposes. Since the 20th century, since the mid-50s, printed circuit board technology, it began to be widely adopted.

before the appearance of the printed circuit board, electronic components are to rely on the interconnection between the wires directly connected to achieve. Now, the circuit bread board is only as an effective experimental tools exist; printed circuit board in the electronics industry has occupied the position of absolute rule.

PCB design
printed circuit board design is based on schematic picture shows the basis for the circuit designer to achieve the functionality required. Design of printed circuit board layout design mainly refers to the need to consider the layout of the external connections, optimize the layout of the internal electronic components, metal wires and through-hole layout optimization, electromagnetic protection, heat dissipation and other factors. Good layout can save production costs, achieve a good circuit performance and heat dissipation. A simple layout can be achieved by hand, complex layout would need help from computer-aided design (CAD) to achieve.

PCB circuit layers according to the classification of
Category: divided into single-sided, double-panel and plywood. Common multilayer laminates usually four or six laminates, complex multilayer boards up to a dozen layers.

be classified according to hardness: is divided into ordinary circuit boards and flexible circuit boards.

PCB industry because of the status quo
the production of printed circuit boards in electronic equipment manufactured in the second half, so it is a downstream industry, the electronics industry. Almost all electronic devices need the support of printed circuit boards, so printed circuit board is the world’s electronic components, products, market share, the highest share of products. Currently, Japan, China (including Taiwan), Western Europe and the United States is the most important printed circuit board manufacturing base.

Chinese:什么是PCB行业?

问题:
看到那些招聘信息上都说懂PCB的优先,可又不知道它是什么东东.知道的请帮我解答.谢谢

回答:
什么是PCB？
　　PCB 即 Printed Circuit Board 的简写，中文名称为印制电路板，又称印刷电路板、印刷线路板，是重要的电子部件，是电子元器件的支撑体，是电子元器件电气连接的提供者。由于它是采用电子印刷术制作的，故被称为“印刷”电路板。

PCB的历史
　　印制电路板的发明者是奥地利人保罗·爱斯勒（Paul Eisler），他于1936年在一个收音机装置内采用了印刷电路板。1943年，美国人将该技术大量使用于xx收音机内。1948年，美国正式认可这个发明用于商业用途。自20世纪50年代中期起，印刷电路版技术才开始被广泛采用。

　　在印制电路板出现之前，电子元器件之间的互连都是依靠电线直接连接实现的。而现在，电路面包板只是作为有效的实验工具而存在；印刷电路板在电子工业中已经占据了{jd1}统治的地位。

PCB设计
　　印制电路板的设计是以电路原理图为根据，实现电路设计者所需要的功能。印刷电路板的设计主要指版图设计，需要考虑外部连接的布局、内部电子元件的优化布局、金属连线和通孔的优化布局、电磁保护、热耗散等各种因素。优秀的版图设计可以节约生产成本，达到良好的电路性能和散热性能。简单的版图设计可以用手工实现，复杂的版图设计需要借助计算机辅助设计（CAD）实现。

PCB的分类
　　根据电路层数分类：分为单面板、双面板和多层板。常见的多层板一般为4层板或6层板，复杂的多层板可达十几层。

　　根据软硬进行分类：分为普通电路板和柔性电路板。

PCB产业现状
　　由于印制电路板的制作处于电子设备制造的后半程，因此被成为电子工业的下游产业。几乎所有的电子设备都需要印制电路板的支持，因此印制电路板是全球电子元件产品中市场份额占有率{zg}的产品。目前日本、中国（包括台湾）、西欧和美国是最重要的印制电路板制造基地。