mec_c1181d1280s40-机械焊盘
pth_c394d276s40.pad
pth_o591x500d354s40
pth_s394d276s40
smd_c394p0s40
smd_o500x1000p0s40
smd_r276x551p0s40
smd_s500p0s40
via_24d16-过孔
后缀的 p0s40 还是不知道什么意思
IPC-7251 & 7351 Padstack Naming Convention
Basic Land Shape Letters
c = Circular
s = Square
r = Rectangle
b = Oblong
u = Contour (Irregular Shape)
d = D Shape (Square on one end and Circular on the other end)
Modifiers that are used when padstack features are different than the defaults
These are the “Variants” or “Modifiers” that go after the basic padstack naming convention.
These are used when the User needs to change the padstack default values either by a different
dimension or a different shape. In instances where shapes are different this becomes a two letter code
with the modifier first followed by the land shape letter.
n = Non-plated Hole
z = Inner Layer land dimension if different than the land on primary layer
x = Special modifier used alone or following other modifiers for lands on opposite side to primary layer
land dimension
t = Thermal Relief; if different than IPC standard padstack – tid_od_sw for 4 spoke default
m = Solder Mask if different than default 1:1 scale of land
p = Solder Paste if different than default 1:1 scale of land
a = Assembly surface land if different than default 1:1 scale of land
y = Plane Clearance (Anti-pad) if the value is different than the Thermal OD
o = Offset Land Origin
k = Keep-out
r = Radius for Rounded Rectangular Land Shape
c = Chamfer for Chamfered Rectangular Land Shape
Shape change is the last letter in the string prior to the dimension.