<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix">Hello,<br>
<br>
Nanostrip cannot replace Piranha for overall semiconductor
substrate cleaning.<br>
<font color="#000066">Nonostrip DOES NOT clean METALS!</font><br>
<br>
Pirnha 3:1 H2SO4:H2O2 is a strong acid , cleaning solution for <font
color="#000099">BOTH METAL & ORGANIC</font><br>
contaminants, with an intense hot surfactant action too.<br>
It was the cleaning "workhorse" of the semiconductor industry for
decades.<br>
It was replaced by RCA clean for some applications and still used
on large scale; actually<br>
the RCA Qurtzware and Teflonware are clened by Pirnaha too.<br>
<br>
Nanostrip could be used for Photoresist or other organic materials
removal indeed, but that is all.<br>
<br>
There is a false impression that Nanostrip is somehow a weak
Piranha; it is not as its reaction with<br>
metals is inhibited. It does not even compare with the well known
Caro etch, which is a weak<br>
Pirnaha ( 1:3) used in the past to final clean the Al pads before
sinter ( before the Asher was inveneted), etc.<br>
<br>
Thanks, Bernard<br>
<br>
<br>
<br>
On 12/4/14 1:02 PM, Kolin Brown wrote:<br>
</div>
<blockquote
cite="mid:BN1PR03MB169A15D0C43009BD29462A2D4780@BN1PR03MB169.namprd03.prod.outlook.com"
type="cite">
<meta http-equiv="Context-Type" content="text/html;
charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered
medium)">
<div class="WordSection1">
<p class="MsoNormal">To all:</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Currently our Environmental Health and
Safety office is creating new disposal procedures for Piranha
Bath. They are also encouraging us to find alternative
processes. In the past at WVU, we used SummaClean by
Malinkrodt Baker as a substitute; however, this product was
discontinued about a year ago. Does anyone know of any other
Piranha bath substitutes?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Kolin Brown </p>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
labnetwork mailing list
<a class="moz-txt-link-abbreviated" href="mailto:labnetwork@mtl.mit.edu">labnetwork@mtl.mit.edu</a>
<a class="moz-txt-link-freetext" href="https://www-mtl.mit.edu/mailman/listinfo.cgi/labnetwork">https://www-mtl.mit.edu/mailman/listinfo.cgi/labnetwork</a>
</pre>
</blockquote>
<br>
</body>
</html>