IFB 25-45 Multi-Equipment Bid poly response.docx

IFB 25-45 Multi-Equipment Bid - Questions & Responses

1. Does the Raman option need to be in an ultra-high vacuum? If so, can you give us some detail on the application for this?

Yes, Carbon coatings, battery electrodes, semiconductors, corroded surfaces

2. Existing Instrumentation and Integration Requirements Will any of the requested systems be required to integrate with existing instrumentation, detectors, software platforms, sample holders, or laboratory workflows currently in use at SUNY Poly? If so, could you please identify any required compatibility requirements?

No.

3. Award Preference Will bids be evaluated and awarded independently for each instrument (SEM, XPS, and FIB-SEM), or will preference be given to vendors capable of supplying all three systems?

Bids will be evaluated and awarded independently.

4. Desktop SEM Requirement The IFB specifies a field-emission desktop SEM. Is a benchtop form factor required, or will a full-size research-grade field-emission SEM meeting or exceeding the requested performance specifications also be considered?

Benchtop form factor is preferred as stated.

5. SEM/FIB-SEM Specifications The chamber geometry, stage travel, and sample size specifications in the desktop SEM section appear to be more consistent with a FIB-SEM than a desktop SEM. Could you please confirm that these specifications have been assigned to the correct instruments?

Yes, they are the preferred specifications for the instrument, but comparable chamber geometries will be considered as well.

6. Immersion Mode Requirement The FIB-SEM specifications require operation in both immersion and field-free imaging modes. Could you please provide additional information regarding the applications that necessitate immersion mode operation?

Immersion mode in FIB‑SEM is mainly required for applications that push SEM resolution and signal quality to the limit, especially when one needs simultaneous or alternating high‑resolution imaging and micro/nanofabrication on very demanding samples. In these cases, the strong magnetic field of the immersion lens is an advantage, while field‑free mode is kept for operations where that field would interfere with FIB or certain analyses.

Possible applications that may require immersion mode are TEM lamella preparation for aberration‑corrected TEM/STEM where ultra‑thin lamellae (<50 nm) for aberration‑corrected TEM/STEM demands extremely high SEM resolution to monitor thickness, uniformity, and damage during FIB milling. Immersion mode enhances SE/BSE imaging at low kV, allowing operators or automation routines to see subtle thickness variations, curtaining, or redeposition artifacts that would be missed in lower‑resolution modes.

Other possible application is high‑resolution 3D volume imaging (Slice‑and‑View / Tomography). Immersion mode is particularly useful when large volumes with fine detail must be analyzed (e.g., biological tissue, materials with large grain structures, complex semiconductor components) while preserving high resolution and wide fields of view.

7. BSE Detector / EBSD Support The specifications reference "EBSD support" for the backscattered electron detector. Could you please clarify the intended functionality or performance requirement associated with this specification?

“EBSD support” on a backscattered electron (BSE) detector typically means that the detector’s geometry, sensitivity, and integration are suitable for use in electron backscatter diffraction workflows, rather than just conventional BSE imaging. In other words, the BSE detector is designed and positioned so it can assist EBSD (and often forescatter imaging) when a dedicated EBSD camera is in use.

Modern EBSD detectors often incorporate forescatter diodes to capture forward‑scattered electrons, giving topographic, orientation, and Z‑contrast images that complement EBSD maps. It also means that BSED is integrated with EBSD software such that BSE images can be acquired and used alongside EBSD data (orientation, phase, strain maps).

8. Variable Pressure Requirement The FIB-SEM specifications require a variable pressure detector; however, no operating pressure range is specified. Could you please clarify the desired pressure range and application requirements for variable pressure imaging?

The FIB-SEM will be used for general-purpose operation, it should provide an adjustable chamber pressure range from high vacuum up to approximately 10–300 Pa, or a comparable manufacturer-supported range. A broader operating range, extending to approximately 500 Pa, would be considered advantageous.

9. Pixelated STEM Detector The specifications require a pixelated STEM detector. Could you please elaborate on the applications or measurement requirements that specifically necessitate a pixelated detector as opposed to a conventional solid-state multi-segment STEM detector?

A pixelated STEM detector is specified when there is a need to go beyond “one‑number- ‑per‑pixel” imaging and instead record the full diffraction pattern at each probe position (4D STEM), enabling advanced phase, field, strain, and crystallographic measurements that conventional solid‑state multi‑segment detectors cannot provide or provide only in a limited way.

Possible applications are strain, lattice parameter, and 3D crystallography for which pixelated STEM detectors preserve detailed angle‑resolved diffraction information, enabling lattice parameter and strain measurements, including components along the beam direction. Also, pixelated detectors greatly enhance differential phase contrast (DPC) and related measurements of electromagnetic fields inside materials making possible the electric field mapping (e.g., in ferroelectrics, oxide interfaces, semiconductor devices) via beam deflection measurements.

10. Double-Tilt STEM Holder Requirement The FIB-SEM specifications require a double-tilt STEM holder compatible with a custom Direct Electron EBSD/TKD camera system. Could you please elaborate on the applications requiring this configuration and whether equivalent solutions providing the same analytical capabilities will also be considered?

A double‑tilt STEM holder that is compatible with a custom Direct Electron EBSD/TKD camera is needed when there is a need to carry out advanced diffraction‑based crystallographic and strain mapping experiments on electron‑transparent specimens in the SEM/FIB‑SEM, with precise control of both sample orientation and imaging geometry.

This configuration is driven by three main application families: 1) transmission Kikuchi diffraction (TKD / t‑EBSD) on thin foils, 2) correlative STEM Imaging + EBSD/TKD diffraction in SEM/FIB‑SEM, and 3) high‑quality, high‑speed EBSD/TKD using direct electron detection to perform nanoscale orientation/phase/strain mapping with improved pattern quality and throughput.

Conventional bulk EBSD geometry and simple single‑tilt holders are sufficient for many tasks but are not adequate for these more advanced transmission‑based, correlative, and direct‑detection applications, which is why this specialized configuration appears in the FIB‑SEM specifications.