IPC¶

Package name: jsl/landpatterns/IPC

Summary¶

IPC Formula Results from Section 3 of IPC 7351B

Function	Description
IpcResults	Constructor for `defstruct IpcResults`

Function	Description
pad-size	Compute the Pad Size from the IPC Formula Results
ipc-formula	Compute Pad Geometry According to IPC Rules

IPC Formula Results from Section 3 of IPC 7351B

public defstruct IpcResults :
    Gmin: Double
    Xmin: Double
    Zmax: Double

TODO: Add Diagram here

Constructor for defstruct IpcResults

public defn IpcResults (Zmax:Double, Gmin:Double, Xmin:Double)

Compute the Pad Size from the IPC Formula Results

public defn pad-size (i:IpcResults) -> Dims

Returns Dims - Dimension of the Pad. The x dimension is the length of the pad in the lead-span direction. The y dimension is the width of the pad in the lead-width direction.

Compute Pad Geometry According to IPC Rules

public defn ipc-formula (L:Toleranced, T:Toleranced, W:Toleranced, fillets:LeadFillets) -> IpcResults

L: Toleranced - Lead-Span or edge-of-lead to edge-of-lead distance for an IC package.
T: Toleranced - Lead Length, length of the exposed contact in the same dimension as L
W: Toleranced - Lead Width, width of the exposed contact in the dimension orthogonal to L
fillets: LeadFillets - Specifications for the solder fillets created when soldering the lead to the land-pattern pad. These parameters define extra spacing around the lead dimension to form these fillets.
Returns IpcResults