TECHNET Archives

November 2009

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Jason Roetz <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Mon, 9 Nov 2009 10:25:34 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (306 lines)
Paintball gun?? 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Hernefjord Ingemar
Sent: Monday, November 09, 2009 9:15 AM
To: [log in to unmask]
Subject: Re: [TN] NTC - [TN] Solder Voids in Chip Components

I laughed high, could see both incidents like on a movie. You are right, never a dull moment.... A few years ago a big male moose trampled into my fresh planted kitchen garden. I had a 5 feet high chicken net around the whole thing to keep out the deers. Mr Moose walked in as if he was just crossing a threshold. I shouted at him, but he only took some further steps and laid down on the grass. The footprints in my poor kitchen garden were   more than one foot deep. I got angry and hit him with some stones from some meters distance. No reaction. Bigger stones. No reaction. I heaved away as big a stone i could handle. There was a 'thugh' in his belly, he rolled his eyes, but didn't go away. What to do? I took a compressed air flash and a truck horn and fired that sound directly into his face. Slowly, he got on legs, went through our thick hedge as if it did not exist, walked into my neighbour's garden and...climbed up on their wooden deck just on outside of their kitchen, and stared into the window. No wonder I heard a shrill from the inside. But not in horror. No, no..the lady was dead angry. Don't know what happened then, because I got other things to think of: mother moose with calves!! I got a long wooden rod and was going to hit her in the rear, but hesitated. Big animals, last summer a jogger was killed by a moose. Just one kick from a moose and you won't get up at 10, nor 100. Maybe never. I have had all kind of ideas how to get rid of them beasts, but in the end, my ideas would be dangerous to myself and others too, so, the war hasn't started yet.

Inge

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: måndag 9 november 2009 15:40
To: [log in to unmask]
Subject: Re: [TN] NTC - [TN] Solder Voids in Chip Components

Hi, Inge
The moose can indeed be a problem, the deer less so. I have a problem moose at my cabin. He likes to come around and rub his antlers on the clotheslines outside. He snaps them off, and I then need to replace them. So I replaced them with 1/8" solid metal cable, came back and found those snapped off also. I'm a little angry now, went to town and got 3/8" stranded cable. Wife woke me up because we heard a lot of thrashing and banging around about 6 a.m. one Saturday morning. We jumped up and looked outside just in time to see Bullwinkle walking into the woods, dragging both T-poles, cables and all behind him. Gave up on that, and went back to rope.

I washed out an empty paint can to use for collecting rain water under the downspout for our little garden up there, which we keep fenced in to keep the deer out. We even have chicken wire over the top. One afternoon we heard a loud bang! on the side of the house. Looking out the window, we saw a small buck running around in our yard with the paint can over its head. Apparently it liked the fresh water in the can, but because his antlers were just little nubs they snapped themselves inside the paint can and the little buck could not get its head out of the can. He was running around in the yard and violently shaking his head in an attempt to get the can off, and in the process was running into trees, the shed, the house, etc. I ran outside and tried to hold onto it while my wife tried to pull the can off, but we could not hang on long enough to pull it off. Then the d%$m deer ran into the lake and started swimming. So I jumped into the boat while my wife called the DNR and explained what was going on. I was able to catch up to the deer and hold its head above the water until the DNR came, put their boat into the water, and caught up. Between the three of us we were able to pry the can off of its head, pull the exhausted buck into the DNR boat, and bring it back to shore. It just laid there for about 10 minutes, then got up and ran away. Neighbor guy took pictures of the whole thing, and it made front page of the Ely Echo.
Never a dull moment up there. Never.


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge
Sent: Saturday, November 07, 2009 3:21 PM
To: [log in to unmask]
Subject: Re: [TN] NTC - [TN] Solder Voids in Chip Components

Hi Dave,
here we use leadfree to, caliber 2 tons. Our cars. Hit  a deer the other day, and my neighbour one deer yesterday. And today two moose calves passed our parking place.  Mother moose was shot, becase she had just three legs.
Traffic incident. I've deers in my garden every night. Not happy with them, eat our flowers, and the moose massacres our fruit trees. Well,shouldn't complain, many kilos of meat from both in the freezer.
/Inge

----- Original Message -----
From: "David D. Hillman" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, November 07, 2009 10:04 PM
Subject: Re: [TN] NTC - [TN] Solder Voids in Chip Components


Hi Bev - yea, I know but its Saturday, the leadfree ballistics investigation on North American waterfowl was excellent today and I happened to log into TechNet since the football games were slow.

Dave



"Bev Christian" <[log in to unmask]>
11/07/2009 02:54 PM

To
<[log in to unmask]>, <[log in to unmask]> cc

Subject
Re: [TN] Solder Voids in Chip Components






Dave,
I was playing devil's advocate. That is what we use too for non-thermal ones. I am also an active member of the BTC committee.
Bev
RIM

----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Sat Nov 07 15:33:44 2009
Subject: Re: [TN] Solder Voids in Chip Components

Hi Bev - the void criteria for a QFN/LGA ground/thermal pad that we use is

50% maximum voiding unless the component has specific thermal or grounding

requirements impacted by voiding phenomena. The topic is also being discussed in the IPC BCT specification.

Dave Hillman
Rockwell Collins
[log in to unmask]




Bev Christian <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
11/07/2009 10:46 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to Bev Christian <[log in to unmask]>


To
[log in to unmask]
cc

Subject
Re: [TN] Solder Voids in Chip Components






Inge,
You get to play with the weirdest stuff!  I was referring to "normal"
cases.

Something more down to earth though is voiding in LGA/QFN central thermal pads. What do people allow for that?
Bev
RIM

----- Original Message -----
From: Inge <[log in to unmask]>
To: TechNet E-Mail Forum <[log in to unmask]>; Bev Christian
Sent: Sat Nov 07 11:41:15 2009
Subject: Re: [TN] Solder Voids in Chip Components

There is an exception, namely when you have to do with high power chips.
We
mounted HexFets that disspated 200 Watts, and those with too much voids simply burnt.

By the way, I got no answer from Kevin about how to planarize heat via solder fills. Anyone?

/Inge
----- Original Message -----
From: "Bev Christian" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, November 07, 2009 5:10 PM
Subject: Re: [TN] Solder Voids in Chip Components


Correct. Or the voids are open to the surface, as Joyce K pointed out to me.
Bev

----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Sat Nov 07 11:02:58 2009
Subject: Re: [TN] Solder Voids in Chip Components

Unless there is a significant "segregation" of rather small voids at one of the interfaces :-)

Vladimir
SENTEC
11 Canadian Road, Unit 7.
Scarborough, ON M1R 5G1
Tel: (416) 899-1882
Fax: (905) 882-8812
www.sentec.ca


-----Original Message-----
From: Bev Christian <[log in to unmask]>
Date:         Sat, 7 Nov 2009 10:59:31
To: <[log in to unmask]>
Subject: Re: [TN] Solder Voids in Chip Components

Alejandro,
No there is not.

In the 10 years I was at Nortel we could never see any significant difference between shear strength of solder joints with low voiding and those that looked like Swiss cheese (up to 50% voiding). I am sure that Werner will come back and rightly say that shear strength does not necessarily equate to solder joint reliability. But I can say we never saw


chip cap problems that were traceable to the joint voids.
Bev

----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Sat Nov 07 10:40:25 2009
Subject: [TN] Solder Voids in Chip Components

Hello,

Does anybody know if there is an IPC specification that describes the amount of solder voids allowed in a chip component solder joint?  The IPC-A-610 Rev D is specific describing the % of voids allowed for BGA's solder joints
(<25%) only but not for any other type of components.

Saludos Cordiales / Best Regards
Alejandro A. Domínguez
Robert Bosch Corporation



---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16


for additional information, or contact Keach Sasamori at [log in to unmask] or


847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public


information. Any use of this information by anyone other than the intended


recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16


for additional information, or contact Keach Sasamori at [log in to unmask] or


847-615-7100 ext.2815
-----------------------------------------------------


---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public


information. Any use of this information by anyone other than the intended


recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16


for additional information, or contact Keach Sasamori at [log in to unmask] or


847-615-7100 ext.2815
-----------------------------------------------------


---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public

information. Any use of this information by anyone other than the intended

recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16

for additional information, or contact Keach Sasamori at [log in to unmask] or

847-615-7100 ext.2815
-----------------------------------------------------


---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.


---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

ATOM RSS1 RSS2