Electronics Forum: alloy 42 (Page 1 of 11)

Alloy 42 Anyone?

Electronics Forum | Thu Mar 02 00:40:20 EST 2000 | Low

hi, wonder anyone has done the electrical analysis of Alloy 42 as used in TSOP? I am interested in obtaining the rel. permeability of the ferromagnetic material... where can I find more info? thanks and regards, hong guan low

Re: Alloy 42 Anyone?

Electronics Forum | Thu Mar 02 16:45:17 EST 2000 | Carol Zhang

Low, You can go to www.matweb.com and check the information by just type alloy 42 to search. Hope you can find some helpful information. Carol

Alloy 42 Anyone?

Electronics Forum | Thu Mar 02 00:40:20 EST 2000 | Low

hi, wonder anyone has done the electrical analysis of Alloy 42 as used in TSOP? I am interested in obtaining the rel. permeability of the ferromagnetic material... where can I find more info? thanks and regards, hong guan low

Re: Alloy 42 Anyone?

Electronics Forum | Thu Mar 02 16:45:17 EST 2000 | Carol Zhang

Low, You can go to www.matweb.com and check the information by just type alloy 42 to search. Hope you can find some helpful information. Carol

Re: Alloy 42 Anyone?

Electronics Forum | Thu Mar 02 20:57:16 EST 2000 | Dave F

Hong Guan: When thinking about high nickel alloys: � Kovar, Alloy 42, and Invar are generally thought of as hermetic sealing materials, because of their coalescence with glass, platabililty, and coefficient of thermal expansion properties. � Permall

Re: Alloy 42 Anyone?

Electronics Forum | Thu Mar 02 20:57:16 EST 2000 | Dave F

Hong Guan: When thinking about high nickel alloys: � Kovar, Alloy 42, and Invar are generally thought of as hermetic sealing materials, because of their coalescence with glass, platabililty, and coefficient of thermal expansion properties. � Permall

QFP Coplanarity & Alloy 42

Electronics Forum | Tue Sep 30 20:05:34 EDT 2003 | afm

Does alloy 42 lead frame on a QFP100 make lack of coplanarity (let's say 2 mils), a critical factor to have non-wetted leads? Lead coating is tin lead 90/10. afm

QFP Coplanarity & Alloy 42

Electronics Forum | Wed Oct 01 15:06:50 EDT 2003 | davef

You're thinking correctly. Concentrate your recipe development efforts by profiling directly on the pads [that some fine designer forgot to thermally isolate properly] of those pesky corner leads that don't solder well.

QFP Coplanarity & Alloy 42

Electronics Forum | Tue Sep 30 21:00:41 EDT 2003 | davef

We're not clear on what you seek. So, as a starting point for our discussion, we wouldn't get agitated if we saw "routine" coplanarity of 4 thou. For instance: Maximum Lead Coplanarity [Altera] Package||Acronym||Lead material||Finish||Maximum Lead

QFP Coplanarity & Alloy 42

Electronics Forum | Wed Oct 01 13:39:13 EDT 2003 | arturoflores

They take the solder in a dip and look solderability test but when in normal reflow process we got some pins that do not get wet and the appearance is as follows: -Pillow effect on the toe(no front fillet is formed) -There is a sheet of flux between

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