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參數(shù)資料
| 型號： | TEA5760UK/N1,023 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PBGA25 |
| 封裝： | 3 X 2.80 MM, 0.60 MM HEIGHT, WLCSP-25 |
| 文件頁數(shù)： | 27/37頁 |
| 文件大?。?/td> | 209K |
| 代理商： | TEA5760UK/N1,023 |
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TEA5760UK_1
NXP B.V. 2006. All rights reserved.
Product data sheet
Rev. 01 — 14 December 2006
32 of 36
NXP Semiconductors
TEA5760UK
Single chip FM stereo radio
14. Soldering
14.1 Introduction to soldering WLCSP packages
This text provides a very brief insight into a complex technology. A more in-depth account
of soldering WLCSP (Wafer Level Chip-Size Packages) can be found in Application Note
AN10439 “Wafer Level Chip Scale Package” and in Application Note AN10365 “Surface
mount reow soldering description”.
Wave soldering is not suitable for this package.
14.2 Board mounting
Board mounting of a WLCSP requires several steps:
1. Solder paste printing on the PCB
2. Component placement with a pick and place machine
3. The reow soldering itself
14.3 Reow soldering
Key characteristics in reow soldering are:
Lead-free versus SnPb soldering; note that a lead-free reow process usually leads to
higher minimum peak temperatures (see Figure 13) than a PbSn process, thus
reducing the process window
Solder paste printing issues, such as smearing, release, and adjusting the process
window for a mix of large and small components on one board
Reow temperature prole; this prole includes preheat, reow (in which the board is
heated to the peak temperature), and cooling down. It is imperative that the peak
temperature is high enough for the solder to make reliable solder joints (a solder paste
characteristic) while being low enough that the packages and/or boards are not
damaged. The peak temperature of the package depends on package thickness and
volume and is classied in accordance with Table 31 and 32
Table 31.
SnPb eutectic process (from J-STD-020C)
Package thickness (mm)
Package reow temperature (
°C)
Volume (mm3)
< 350
≥ 350
< 2.5
235
220
≥ 2.5
220
Table 32.
Lead-free process (from J-STD-020C)
Package thickness (mm)
Package reow temperature (
°C)
Volume (mm3)
< 350
350 to 2000
> 2000
< 1.6
260
1.6 to 2.5
260
250
245
> 2.5
250
245
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