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Engineering stage

Prober barcode scanner and LOT handling

A relay validates the scanned LOT (≤ 18 characters) and writes it to the native barcode interface.

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CP hall model: a UF200 prober and a barcode scanner on the stand beside it Model rendering

Key facts

Entry point
Native barcode interfaceWritten through the relay · no keystroke emulation
LOT length limit
18charactersAligned with the machine's own field
Scanner
USB HIDKeyboard mode · no brand or model lock
If validation fails
Not sentRejected scans are logged only

From scan to machine

The scanner's reading goes to the relay first: the LOT segment is extracted by rule, then checked against the machine's field definition. Only a pass is written to the native barcode interface; anything else stops outside the machine, with the reason recorded.

LOT entry flow: a USB scanner reads a long barcode containing wafer number, LOT and date; the relay extracts the LOT segment by rule and validates it, and only a pass is written to the prober's native barcode interface; with no rule the barcode passes through unchanged; a failed validation is not sent; scan records stay on the relay side Developed by Probing Site equipment USB scanner HID keyboard mode No brand or model lock Wafer LOT Date Scan Relay Rules hot-loaded · no service restart Extract LOT segment LOT Takes only this segment Regex · replace · case · trim First match by priority Validate Length ≤ 18 characters A–Z, 0–9 and . _ - First character alphanumeric Pass Prober Native barcode interface Machine program untouched Whether the LOT is accepted Per machine-side record No rule: passed through unchanged Raw barcode Validation fails: not sent Scan record · relay side Barcode · LOT · wafer no. · device · operator · disposition Written by the collector only, no manual entry LOT entry flow: a USB scanner reads a long barcode; the relay extracts the LOT segment and validates it, and only a pass is written to the prober's native barcode interface; a failed validation is not sent; scan records stay on the relay side Developed by Probing Site equipment USB scanner Wafer LOT Date HID keyboard mode · no brand or model lock Scan Relay Rules hot-loaded · no service restart Extract LOT segment LOT Only this segment Regex · replace · uppercase / trim First match by priority No rule: barcode passes through unchanged Validate Length ≤ 18 characters A–Z, 0–9 and . _ - First character alphanumeric Pass Check fails Not sent Prober Native barcode interface Program untouched LOT accepted or not Per machine-side record Scan record · relay side Barcode · LOT · wafer Device · operator Disposition Collector-written only
Illustration: readings are written through the relay to the machine's native barcode interface, not through a keystroke-emulation route. With no rule, the barcode passes through unchanged; a failed validation is not sent and only logged.

Applications

When the LOT number is typed into a prober by hand, one wrong character files a whole batch under another batch's name. The cost lands later, in retests and in tracing.

Replacing manual LOT entry

The operator's entry changes from typing each character to scanning. The reading is written to the machine through the relay, so this step no longer depends on manual input and batch-number mistakes fall.

Extracting only the LOT from a long barcode

When a barcode carries batch, wafer and date fields together, only the LOT segment is sent to the machine. Extraction rules are configured for the barcode format in use on site.

Drag-select the rule on site

Scan a real barcode, drag-select the LOT segment, and the rule is generated, with a live preview and a test field. After deployment the relay hot-loads the rule, so changing rules needs no service restart.

Every entry leaves a trace

Scan records stay on the relay side, so the raw barcode behind each entry can be traced. Records are written by the collector only and cannot be entered by hand.

Integration steps

The integration method is confirmed per machine model and interface on site.

  1. Interface checkConfirm the barcode port on the machine and the scanner on site.
  2. Rule setupScan real barcodes, drag-select the LOT and preview the generated rule.
  3. Trial runValidate extraction and checking against real batches and watch the rejects.
  4. Delivery definitionSet deployment scope and support model from the validation results.

Integration boundary

Machine side

Writes only to the machine's native barcode interface; the prober's own control software is untouched. Whether it can be used depends on the model having that interface.

Data side

Scan records are written by the collector and cannot be entered by hand; whether the machine accepted a LOT is decided by the machine's own record.

On-site configuration

Deployment form and operator screens are configured for the site language. Validation rules follow each machine's own field definition.

Specifications

Full specification table (9 items)
ItemSpecification / configurationNotes
Project stageEngineering, in-houseValidation rules follow each machine's own field definition
Integration pathUSB scanner to relay to the prober's native barcode portNo keystroke-emulation route
Scanner compatibilityAny USB HID keyboard-mode scannerNo brand lock-in, with auto-detection
Rule modelRegex pattern, replacement, priority, case and trimHighest-priority match applies
Rule authoringScan once, drag-select the LOT, rule is generatedWith live preview and a test field
LOT validationUp to 18 characters, A-Z, 0-9 and . _ -, alphanumeric first characterAligned with the prober's own LOT field
Failure policyNo rules means pass-through; a match that fails validation is not sentRejected scans are logged only
Rule deploymentAtomic snapshot replacement, hot-reloaded by the relayNo service restart to change rules
Traceability recordBarcode / LOT / wafer / device / operator / dispositionRecords are written by the collector only

Items not listed follow the technical agreement.

Maker model names appear here to define the range of machines we can take on; they do not indicate authorisation, certification or endorsement by those makers. The barcode scanner and LOT handling project is our own development, and the badge on the page is the authority on where it stands.

Related pages

Prober information boxA bolt-on collection unit that leaves the machine program unchanged and carries output, cumulative card touchdowns and wafer geometry to the plant network and board. Prober servicesBrings installed probers up to what modern fabs and OSATs ask for, covering APM90A, UF200, UF3000 and other models. CP hall · station 03See the UF200 barcode scanner and LOT handling station in the CP hall modelled on real machines.

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