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Date: | Mon, 4 Dec 2017 19:53:01 +0000 |
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Yes, I agree with Mr. Kondner. The only other problem I have with them is that MELF glass diodes are notorious for cracking issues. Look at them cross-eyed and they crack.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of rkondner
Sent: Monday, December 04, 2017 11:25 AM
To: [log in to unmask]
Subject: Re: [TN] MELF land shapes
Yes, I still use MELFs. Regular and mini MELF.
They are round and they can roll but place a Coke Bottle on wet sand, give it a slight push down and it does not roll.
I think the biggest problem with MELFs is spinning them to the correct rotation when using a flat steel Pick and Place tip. If you use a tip with the rounded end then no problem.
And I have always used rectangular pads with no problem. I like MELFs as they solder well and tend to be very easy to inspect.
Bob K.
On 12/4/2017 11:55 AM, Jack Olson wrote:
> I am using MELF components on my current design, which I haven't seen
> much this century.
> But I remember way back when we used "U-shaped" land shapes.
>
> I notice the current Land Pattern standard (IPC-7351) recommends
> rectangular, but at least one person has suggested using U-shaped
> "just in case".
> I generally resist that kind of philosophy unless there is science
> behind it.
> Is anyone using U-shaped pads anymore?
> (Is anyone using MELFs anymore? smile)
>
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