Abstract:
An apparatus for monitoring sample milling in a charged-particle instrument has a variable-tilt specimen holder (130) attached to the instrument tilt stage (120). The variable-tilt specimen holder (130) includes a first pivoting plate (260) having a slot (280) for holding a specimen (290) rotatably supported in the variable-tilt specimen holder (130). The first pivoting plate (260) has a range of rotation sufficient to move the preferred axis of thinning of the specimen (290) from a first position where the tilt stage (120) is placed at its maximum range of tilt and the angle between the preferred axis of thinning of the specimen (290) and the axis of the ion beam column (110) of the instrument is greater than zero, to a second position where the preferred axis for thinning of the specimen (290) is substantially parallel to the axis of the ion-beam column (110). A light detector (250) is positioned to intercept light passing through the specimen (290) as it is thinned by ion-beam milling. The intensity of the light passing through the specimen (290) may be compared to the intensity recorded for previous stages of milling to determine an endpoint for milling
Abstract:
A variable-tilt specimen holder (100) for a charged particle instrument having a tilt stage (360), where the tilt stage (360) has a maximum range of tilt, a sample plate (280) affixed to the tilt stage (360), and an ion-beam column (320) having an ion-beam column axis. The variable-tilt specimen holder (100) has a base (110) for mounting to the sample plate (280), so that the base (110) is substantially parallel to the tilt stage (360). A rotatably supported pivot plate (140) has slots (210) for holding TEM specimens (270) or TEM grids holding specimens (270). The pivot plate (140) is rotatable so that the TEM specimens (270) held therein can be aligned with the axis of the ion beam column (320) for thinning of the specimen (270). The pivot plate (140) has a range of rotation sufficient to move the preferred axis (275) of thinning of the specimen (270) from a first position where the tilt stage (360) is placed at its maximum range of tilt and the angle between the preferred axis (275) of thinning of the specimen (270) and the axis of the ion beam column (320) is greater than zero, to a second position where the preferred axis (275) for thinning of the specimen (270) is substantially parallel to the axis of the ion-beam column (320).
Abstract:
We disclose methods for materials deposition on a surface (120) inside an energetic-beam instrument, where the energetic-beam instrument is provided with a laser beam (170), an electron beam (100), and a source (130) of precursor gas (150). The electron beam (100) is focused on the surface (120), and the laser beam (170) is focused to a focal point (190) that is at a distance (200) above the surface (120) of about 5 microns to one mm, preferably from 5 to 50 microns. The focal point (190) of the laser beam (170) will thus be within the stream of precursor gas (150) injected at the sample surface (120), so that the laser beam (170) will facilitate reactions in this gas cloud with less heating of the surface (120).
Abstract:
We disclose methods for materials deposition on a surface (120) inside an energetic-beam instrument, where the energetic-beam instrument is provided with a laser beam (170), an electron beam (100), and a source (130) of precursor gas (150). The electron beam (100) is focused on the surface (120), and the laser beam (170) is focused to a focal point (190) that is at a distance (200) above the surface (120) of about 5 microns to one mm, preferably from 5 to 50 microns. The focal point (190) of the laser beam (170) will thus be within the stream of precursor gas (150) injected at the sample surface (120), so that the laser beam (170) will facilitate reactions in this gas cloud with less heating of the surface (120).
Abstract:
An apparatus for performing automated in-situ lift-out of a sample (150) from a specimen (125) includes a computer (100) having a memory with computer-readable instructions, a stage (120) for a specimen (125) and a nano-manipulator (130). The stage (120) and the nano-manipulator (130) are controlled by motion controllers (110) connected to the computer (100). The nano-manipulator (130) has a probe tip (140) for attachment to samples (150) excised from the specimen (125). The computer-readable instructions include instructions to cause the stage motion controllers (110) and the nano-manipulator motion controllers (110), as well as an ion-beam source (170), to automatically perform in-situ lift-out of a sample (150) from the specimen (125).
Abstract:
An apparatus for testing flip-chip packages has a programmed computer (100), a test-engine stage (130) for applying an impact to at least one package (110) under test, and a monitoring stage (140). The test-engine stage (130) causes an impact on the package (110) on the side opposite its ball-grid array. The test-engine stage (130) has actuators connected to the test-engine stage (130) and the computer (100), for moving and aligning the test-engine stage (130). The monitoring stage (140) has a digital camera (300) connected to the computer (100) for transmitting digital images from the ball-grid array side of the package (110) to the computer (100). A microscope (290) is preferably connected to the digital camera (300). A sample stage (120) located between the test-engine stage (130) and the monitoring stage (140) holds the package (110 under test. The sample stage (120) has an acoustic transducer (190) capable of being removably connected to the package (110) under test. The acoustic transducer (190) is connected to the computer (100) for transmitting signals from the acoustic transducer (190) to the computer (100).
Abstract:
We disclose an apparatus and method for detecting probe-tip (120) contact with a surface, generally inside a focused ion-beam instrument, where the probe tip (120) is attached to a capsule (130), and the capsule (130) is movably secured in a probe shaft (140). There is a fiber-optic cable (150) having a first end and a second end; a beam splitter (115) having first and second output ports; and a light source (100) connected to the beam splitter (115). The first output port of the beam splitter (115) is connected to the first end of the fiber-optic cable (150), and the second output port of the beam splitter (115) is connected to a photodiode (110). The second end of the fiber-optic cable (150) has a mirror (155) for reflecting incident light at approximately a ninety-degree angle to the axis of the optical path in the fiber-optic cable (150) and onto the capsule (130), so that the intensity of the light reflected back from the capsule (130) through the fiber-optic cable (150) is proportional to the deflection of the capsule (130) as the probe tip (120) makes contact with the surface.
Abstract:
We disclose a method for analyzing the composition of a microscopic particle (100) resting on a first sample surface (110). The method comprises positioning a micro-manipulator probe (120) near the particle (100); attaching the particle (100) to the probe (120); moving the probe (120) and the attached particle (100) away from the first sample surface (110); positioning the particle (100) on a second sample surface (150); and, analyzing the composition of the particle (100) on the second sample surface (150) by energy-dispersive X-ray analysis or detection of Auger electrons. The second surface (150) has a reduced or non-interfering background signal during analysis relative to the background signal of the first surface (110). We also disclose methods for adjusting the electrostatic forces and DC potentials between the probe (120), the particle (100), and the sample surfaces (110, 150) to effect removal of the particle (100), and its transfer and relocation to the second sample surface (150).
Abstract:
A coupon (100) for preparing a TEM sample holder (170) comprises a sheet of material (120) that includes a TEM sample holder form (170). There is at least one section of the sheet (120) connecting the TEM sample holder form (170) to other portions of the sheet (120). A TEM sample holder (170) is formed by cutting the TEM sample holder form (170) from the coupon in a press. The cutting joins the tip point (160) of a nano-manipulator probe tip (150) with the formed TEM sample holder (170). The tip point (160) of the probe (150) has a sample (140) attached for inspection in a TEM.