非金属化孔,Non-Plated Through Hole, 缩写为NPTH,就是仅仅在板子成品的后工序中,单纯钻一个孔而已,用作机械的定位而已。这个孔跟金属化孔一样,也可以有钻孔跟焊盘,只是过孔的内壁是没有铜的,所有叫做非金属化孔。金属化孔与非金属化孔的最大的区别在于过孔的内壁是否有铜,在PCB版图中看到的非金属化孔的效果...
2、非沉铜孔NPTH(Non Plating Through Hole),孔壁无铜,一般是定位孔及螺丝孔。 如果螺丝孔不需要镀铜,可以这样操作,输入PP(Place Pad), 鼠标那个位置就会出现一个焊盘,按键盘左上角的Tab键,在弹出的窗口那里选择孔径大小,X,Y尺寸也是孔径尺寸(没有焊环),Plated后面方框里的勾去掉,这样就形成了一个机械螺丝定位...
2、非沉铜孔NPTH(Non Plating Through Hole),孔壁无铜,一般是定位孔及螺丝孔。 如果螺丝孔不需要镀铜,可以这样操作,输入PP(Place Pad), 鼠标那个位置就会出现一个焊盘,按键盘左上角的Tab键,在弹出的窗口那里选择孔径大小,X,Y尺寸也是孔径尺寸(没有焊环),Plated后面方框里的勾去掉,这样就形成了一个机械螺丝定位...
非金属化孔(Non-Plated Through Hole,NPTH)就是指仅在PCB成品的后工序中钻一个孔,用作机械定位。这个孔跟金属化孔一样,也可以有钻孔和焊盘,只是过孔的内壁没有铜,所以叫非金属化孔。非金属化孔与金属化孔的最大区别就在于过孔的内壁是否有铜,在PCB版图中看到的非金属化孔效果如图1-17所示,最显著的特征就是...
If a via or pad is not used on a signal layer, that unused ring of copper is often referred to as a Non-Functioning Pad (NFP). Non Functioning Pads that are on a layer that is to be back drilled are automatically removed at each back drill hole site. Remaining NFPs can ...
什么叫做金属化孔?..金属化孔,Plated Through Hole,缩写为PTH,又称沉铜、孔化、镀通孔。就是指孔金属化这一种工艺,是指各层印制导线在孔中用化学镀和电镀方法使绝缘的孔壁上镀上一层导电金属使之互相可靠连通
to access copper layers; Z-axis expansion defects due to the higher CTE (coefficient of thermal expansion) of acrylic adhesive; and moisture out gassing due to the higher rate of moisture absorbance, which can result in resin recession, blow outs and delamination at plated through hole sites. ...
non plated through holes. If the pin is metallic in the 3D model or specified in the notes that the pins are metallic, most likely they would need a plated through hole unless otherwise specified. You may have an non plated through hole for a metallic pin, but it has to be specified ...
•Platedand/ornon-platedholes. •Holesassociatedwithpads/viasthatarepartofacomponentand/orfree. •Allholetypes,oronlyround,squareorslottedholes. •Selectedand/orunselectedholes. •Onlythelayer-pairsofinterest. Oncethecriteriadefined,thepanellistsalluniqueholedefinitionsandsubsequentlythepadsand/orvias...
•Platedand/ornon-platedholes. •Holesassociatedwithpads/viasthatarepartofacomponentand/orfree. •Allholetypes,oronlyround,squareorslottedholes. •Selectedand/orunselectedholes. •Onlythelayer-pairsofinterest. Oncethecriteriadefined,thepanellistsalluniqueholedefinitionsandsubsequentlythepadsand/or ...