Footprints made by Fped

Adam Wang adam at sharism.cc
Mon Jul 2 05:53:45 EDT 2012


Hi,

About these footprints made by Fped, can be used in KiCad. So we collected
footprints under KiCad Libraries, still some few footprints from else
projects have not been added.
See INFO,
http://projects.qi-hardware.com/index.php/p/kicad-libs/source/tree/master/modules/INFO

Most of them are for M1r4, few are for other projects.

Before editing, normally reference to module's datasheet to find info of
'package drawing' and 'land pattern'.
A good chip maker supposedly provides both of them. But practically it's
not in usual.

Another IPC standard 7351 is thorough document to know Generic Requirements
for Surface Mount Design and Land Pattern Standard.
It's a very good guideline and info to completely build generic
package(i.e.:

discrete components
gullwing leaded components, two sides
J-Leaded components, two sides
gullwing leaded components, four sides
J-Leaded components, four sides
Post (DIP) leads, two sides
Area Array components (BGA, FBGA, CGA)
no lead components (QFN, SON, LCC))

so a research work indeed needed but take times.

If you are lucky, maker did all details for you. While editing 'c-t-smd'
packages for Chip SMD Tantalum Capacitors, KEMET lists directly dimensions
for three levels of density, so I named variants with
"TC-$Case-$EIA-$Density":
Case is as capacitor type, EIA is its standard size, Density is for density
level from IPC. Then a work in Fped GUI is easy.

If not, editing package work is more likely a follow-up with datasheet.
Even it's not enough to know if completely met with IPC.
At least component maker will show up which standard they follows and
usually set dimensions in as "Density Level B: Median (Nominal) Land
Protrusion".

Means that there's a lot of improvements could be studied in the future
once you use for your need.
Btw, it's a start.

The lists of file name(*.fpd) below are shown:

8_10-card
8_10-socket-ra
bga
>> only for 484 pins
c-smd
>> Chip SMD Aluminum Electrolytic Capacitors
c-t-smd
>> Chip SMD Tantalum Capacitors
dcjack
din-5
do-214
dvi-recept-ra
eus
fiducial
he-2row-dip
header
he-shrouded
ir
ledsmd
mdip
meander-2.4GHz
mic-ra-dip
mini_usb_b
pads
pads-array
qfn
qfp
phonejack
rca-3-ra
rj45
soic
sot
sot23
stdpass
mmst3904
spacer
ssop
tactile-sw-spst-ra-dip
to
tsop
tssop5
usb-a-dual-recept-r
usb_a_plug_smt
usb-a-pcb
xlr-socket
xlr-plug
xtal-2
xtal-4

Regards,
-- Adam
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