| 摘要 |
A packaging tray (2) includes an elongate base (3). The base includes supporting portions (31) for receiving CPU sockets (1) therein. Each supporting portion includes four sidewalls (311), and a bottom wall (313) having an upper surface and a lower surface. Each sidewall forms an inwardly extending rib (312). Four standoffs (314) are formed on the lower surface. When mounting the CPU sockets on the upper surfaces, each CPU socket rests on the corresponding ribs, and solder balls of the CPU socket are supported by the corresponding upper surface. Thus, in handling of the CPU sockets, the solder balls are unlikely to sustain damage. Conversely, the CPU sockets can be reverse mounted on the lower surfaces. The solder balls of each CPU socket are located in a horizontal plane face up, with the standoffs supporting the CPU socket. The solder balls can be accurately inspected by a flatness inspection device.
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