Cypress Reflow Profile.pdf

Table 2
Reflow Profiles (per Jedec J-STD-020D.1)
Profile Feature
Sn-Pb Eutectic Assembly
Pb-Free Assembly
100 °C
150 °C
60-120 seconds
3 °C/second max.
183 °C
60-150 seconds
For users Tp must not exceed the
Classification temp in Table 2A. For
suppliers Tp must equal or exceed the
Classification temp in Table 2A
150 °C
200 °C
60-120 seconds
3 °C/second max.
217 °C
60-150 seconds
For users Tp must not exceed the
Classification temp in Table 2B. For
suppliers Tp must equal or exceed the
Classification temp in Table 2B
Preheat/Soak
Temperature Min (Tsmin)
Temperature Max (Tsmax)
Time (ts) from (Tsmin to Tsmax)
Ramp-up rate (TL to Tp)
Liquidous temperature (TL)
Time (tL) maintained above TL
Peak package body temperature
(Tp)
Time (tp)* within 5 °C of the specified
classification temperature (Tc), see
Table 2a & 2B
20* seconds
30* seconds
Figure 5-1. J-STD-020D.1
Ramp-down rate (Tp to TL)
6 °C/second max.
6 °C/second max.
Time 25 °C to peak temperature
6 minutes max.
8 minutes max.
* Tolerance for peak profile temperature (Tp) is defined as a supplier minimum and a user maximum
.
Table 2A
SnPb Eutectic Process - Classification Temperatures (Tc)
Volume mm3
Volume mm3
<350
Package Thickness
>=350
235 °C
<2.5 mm
220 °C
220 °C
220 °C
>=2.5 mm
Table 2B
Pb-Free Process -Classification Temperatures (Tc)
Package Thickness
<1.6 mm
1.6 mm - 2.5 mm
>2.5 mm
Volume mm3
<350
260 °C
260 °C
260 °C
Volume mm3
350 - 2000
260 °C
250 °C
245 °C
Volume mm3
>2000
260 °C
245 °C
245 °C
Note:
1. The use of a higher Tp does not change the classification temperature (Tc).
2. All temperatures refer to topside of the package, measured on the package body surface.
3. Package volume excludes external terminals (e.g., balls, bumps, lands, leads) and/or nonintegral heat sinks.
4. Moisture sensitivity levels of components intended for use in a Pb-free assembly process shall be evaluated
using the Pb-free classification temperatures and profiles defined in Tables 2 and 2B, whether or not Pb-free.
Appendix A
Solder Reflow Temperature Profile
Classification Profile (Not to scale)