Original question:
What is the meaning of the small lasered bars in on the component? Pin one mark in the line across the device body. In question are the short lines near the package mold borders, and above and below the 271Q part marking? There are various versions/combinations
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The Standard Linear & Logic Semiconductor Marking Guidelines application report (at page 398 of the Design Considerations for Logic Products Application Book, Vol. 3) says:
Additional special formats are used on very small packages, such as SOT/TO. The format is tailored to the specific package. Figure 8 shows one special format, for the DBV package.
In this example, the year and month are binary codes along the edges of the device (year is 5 for 1995, and month is 9 for September).
