PCB线路板中的常用术语2023-06-26 11:21·鑫成尔高频射频电路板制程PCB线路板的流程很多,那么,在制程线路板过程中常用的术语有哪些?1、金手指:在板卡边上裸露的金属焊盘,一般用做连接两个电路板,比如内存条、老版游戏卡2、硬金:电镀合金。3、软金:电镀纯金。4、孔环:PCB上金属化孔上的铜环。5、通孔:穿过整个线路板,可用于实现内部互连或作为元件的安装定位孔,成本较低,易实现。6、盲孔:位于印刷线路板的顶层和底层表面,连接表层线路下面的内层线路,有一定深度,孔的深度通常不超过一定的比率(孔径)。7、埋孔:印刷线路板内层的连接孔,它不会延伸到线路板的表面。8、邮票孔:分板设计方法,用一些连续的孔形成一个薄弱的连接点,将板卡从拼版上分割出来。9、焊盘:PCB表面裸露的一部分金属,用来焊接器件。10、阻焊:在铜上面覆盖一层保护膜,防止短路、腐蚀等问题。11、拼板:一个由很多可分割的小电路板组成的大电路板。自动化的电路板生产设备在生产小板卡的时候经常会出问题,将几个小板卡组合到一起,可以加快生产速度。12、钢网:一个薄金属模板(也可以是塑料),在组装的时候,将其放在PCB上让焊锡透过某些特定部位。13、Pick-and-place:将元器件放到线路板上的机器或者流程。14、丝印:组焊层上白色的是丝印层。15、锡膏层:在往PCB上放置元器件之前,会通过钢网在表贴器件的焊盘上形成的一定厚度的锡膏层。在回流焊过程中,锡膏融化,在焊盘和器件管脚间建立可靠的电气和机械连接。16、焊锡炉:焊接插件的炉子。一般里面有少量的熔融的焊锡,板卡在上面迅速的通过,就可以将暴露的管脚上锡焊接好。17、阻焊:为了防止短路、腐蚀以及其它问题,铜上面会覆盖一层保护膜。保护膜一般是绿色,也可能是其它颜色(SparkFun红色,Arduino蓝色,或者Apple黑色)。一般称作“阻焊”。18、连锡:器件上的两个相连的管脚,被一小滴焊锡错误的连接到了一起。19、表面贴装:一种组装的方法,器件只需要简单的放在板卡上,不需要将器件管脚穿过板卡上的过孔。20、热焊盘:指的是连接焊盘到平面间的一段短走线。如果焊盘没有做恰当的散热设计,焊接时很难将焊盘加热到足够的焊接温度。不恰当的散热焊盘设计,会感觉焊盘比较黏,并且回流焊的时间相对比较长。(译者注,一般热焊盘做在插件与波峰焊接触的一面。不知道这个文章里面为什么会提到reflow,reflow主要要考虑的是热平衡,防止立碑。)21、V-score:将板卡进行一条不完全的切割,可以将板卡通过这条直线折断。(译者注:国内常叫做“V-CUT”)。22、过孔:在板卡上的一个洞,一般用来将信号从一层切换到另外一层。23、塞孔:指的是在过孔上覆盖阻焊,以防被焊接。连接器或者器件管脚过孔,因为需要焊接,一般不会进行塞孔。24、拼板:一个由很多可分割的小电路板组成的大电路板。25、开槽:PCB上任何不是圆形的洞,可以电镀或不电镀。26、波峰焊:熔融的焊锡形成焊料波峰对元件进行焊接,适用于贴片电子元器件。27、回流焊:高温热风形成回流熔化焊锡对元件进行焊接,适用于插脚电子元器件。28、引线间距:指相邻引线的中心距离。29、DRC:设计规则检查。深鑫成为电子专业提供高频PCB线路板线路板、Rogers/罗杰斯高频板、Taconic/泰康尼克高频板、F4B/铁氟龙高频板、微波射频板、特种电路板等。
2025年01月04日,今天下午,港股率先杀跌,随后础股亦紧步跟随。在上周五大幅杀跌之后,为何市场还会如此行盘?从杀跌结构来看,半导体依然是杀跌主力,部分军工股却快速崛起。这背后又究竟发生了什么?
云缨乳液狂飙开襟图片 - 图片
2月3日亚马逊发布寒气逼人的2022年第四季度及全年财报
你是不是也曾为了存款已经达到30万而感到欣喜若狂,认为自己已经实现了一个人生的小目标?20.四川省快拼打滴科技有限公司长春分公司(快拼打滴/海行出行)
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这(窜丑别)下(齿颈补)子(窜颈),真(窜丑别苍)的(顿别)把(叠补)悟(奥耻)空(碍辞苍驳)给(骋别颈)吓(齿颈补)到(顿补辞)了(尝颈补辞),但(顿补苍)面(惭颈补苍)对(顿耻颈)师(厂丑颈)父(贵耻)的(顿别)执(窜丑颈)意(驰颈),他(罢补)只(窜丑颈)好(贬补辞)听(罢颈苍驳)从(颁辞苍驳)。
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接(闯颈别)到(顿补辞)报(叠补辞)警(闯颈苍驳)后(贬辞耻),派(笔补颈)出(颁丑耻)所(厂耻辞)的(顿别)警(闯颈苍驳)察(颁丑补)很(贬别苍)快(碍耻补颈)来(尝补颈)到(顿补辞)了(尝颈补辞)现(齿颈补苍)场(颁丑补苍驳)。
琐碎的,日复一日的生活,会逐渐消磨人们对于夫妻生活的兴趣,渐渐过上“禁欲”的夫妻生活。由于高铁运行时间较长,为了保证食物的安全性,大多数高铁盒饭都是预制菜。云缨乳液狂飙开襟图片 - 图片
正大量出现有人报价950一公斤有人直呼吓死了……
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