User Guide

CCS Technical Documentation 4 - Service Tools
Company Confidential NMM-3
Issue 1 (11/2003) Copyright  2003 Nokia Corporation Page 4-17
Company Confidential
5. Rework Equipment and Tools
The same soldering irons and hot air guns can be used as in the Pb-process.
Studies are being made on the capability of rework stations approved for a process that
contains lead ( Zevac / Airvac, Metcal BGA 3000 series) to see how they perform in con-
nection with the lead-free process.
(The performance of Zevac with a lead-free process would seem adequate. In the case of
Metcal Series BGA 3000 equipment, minimum temperature may be the limiting factor.)
More info about tool requirements will be updated later on.
5.1 Manual Soldering Using Soldering Iron
5.2 Manual and Semi-automatic Hot Gas Soldering
6. Rework Station Heating Profile
When creating the heating profile, the main requirement is that the profile meets the
Pb-free reflow profile specifications. The shape and length of the profile might differ
depending on component type (e.g. shields, big ground area).
All profiles shall fulfill the Pb Free Reflow Soldering Profile Specification.
Parameter Specification
Tip diameter
Selected to fit application
Tip temperature for soldering
SMD components
+380 °C ± 10 °C max. (tip temperature in idle
mode, not in contact with soldering location)
or: Metcal 700 Series soldering tip
Parameter Specification
Max. air temperature/time
measured at PWB surface
+260 °C/30 s
Table 1: Process key parameter
Item Specification
Melting point 217 °C
Time above 217 °C 35…60 s
Time above 230 °C 25…50 s
Peak temperature
(Temperature between component and PWB)
232…250 °C
Component surface temperature Max. 260 °C