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PELCO® Pro Gold Plated Tweezers

Mica and Single Crystal Substrates
Silicon Chip Specimen Supports and Wafers
Gold Coated Silicon Wafers, Slides and Coverslips

Mica Substrates for AFM, TEM and SEM

Mica Disks Highest Grade V1	Highest Grade Mica Sheets V1	Hi-Grade Mica Grade V2	Mica Sheets V5
Silicon Chip Supports	Silicon Wafers	Gold Coated Silicon Wafers	Gold Coated Microscope Slide and Coverslips
Ultra-Flat SiO2 Substrates	Silicon Nitride Disks	Single Crystal Substrates	PELCO Quartz Substrate Discs

Freshly cleaved muscovite mica surfaces have an outstanding even surface, are optically flat, clear, transparent, scratchless and free from fingerprints. They are very useful in electron microscopy for production of carbon support films, particle imaging, cell growing and thin film coating research. Muscovite mica surface are also suitable as substrates for high resolution atomic force microcopy studies such as DNA, DNA-protein and thin films.

Cleaving mica involves insertion of a sharp edge or point into an edge or corner of the sheet and gently prying apart the leaves. A good sharp razor blade edge will do the job and in some cases a sharp pointed tweezer may accomplish this.. The freshly exposed micro surface should be used immediately after cleaving to take advantage of the clean and even surface. The muscovite mica is die cut to the sizes offered. The thickness of the mica sheets varies between 0.18 - 0.25mm (0.007 - 0.01") which yields much thinner, uniform sheets.
Cleaving can also be achieved by placing a double coated piece of tape onto the mica surface and gently pulling off the mica layer starting on one edge of the mica. Then place mica with tape side down on to a specimen disc or mount.

Ruby muscovite color ranges from almost white through pink to a light ruby and into shades of brownish ruby and brown. It is considered of higher quality (compared to green muscovite) because of hardness and excellent cleavage properties permitting it to be split into the thinnest desired film without the risk of cracking. It is optically flat, resilient and incompressible. While it splits into thin films along its cleavage planes, it remains tough and elastic, even at high temperatures.

Chemically, mica is a complex hydrous silicate of aluminum, containing potassium, magnesium, iron, sodium fluoride and/or lithium and traces of other elements. It is stable and inert to water, acids (except hydrofluoric and concentrated sulfuric acids), alkalis, conventional solvents and oil.
Our mica has minimum inclusions, minimum air and bubbles and is clean. ASTM D-351 describes grading standards for mica.
See this link for Properties and chemical composition of Mica Grade V1

Early references to this technique include Professors Dan Pease, C.E. Hall and Robert Bils
Bils R.F., Hall C.E., 1962. Biology, 17, 123-130
Pease D.C., 1964. Histological techniques for electron microscopy, 2nd ed, pp 208-209, (Academic Press)
Hall C.E., 1966. Introduction to electron microscopy, 2nd ed, (McGraw Hill)

Mica Grades Mica grades from V-1 to V-5 with V-1 being the highest quality.
V-1	Clear, hard, of uniform color, nearly flat, free from stains, foreign inclusions, cracks and other similar defects.
V-2	Clear and slightly stained. May contain slight crystallographic discoloration and very slight air inclusions in one fourth of the usable area.
V-3	Fair stained. Hard, of uniform color, may contain slight waves, slight crystallographic discoloration, and medium air inclusions in not more than one half of the usable area.
V-4	Good stained. Hard, of uniform color, may contain medium waves. Slight crystallographic discoloration and medium air inclusions in not more than two thirds of the usable area.
V-5	Stained A quality. Hard, may contain medium air inclusions, uniformly distributed in the usable area, slight green vegetable stains and medium waviness.

mica disks for scanning electron microscopy

Highest Grade Mica Disks

Recommended for AFM
Highest quality grade V1 mica, 0.21mm (.0085”) thick. Interleaved, in packages of 10.
Available in four diameters:
10mm (0.39")
12mm (0.47")
15mm (0.59")
20mm (0.79")

Prod # Description Unit Price Order / Quote

50
Highest Grade V1 Mica Discs, 10mm
pkg/10
$9.98

Qty:

50-12
Highest Grade V1 Mica Discs, 12mm
pkg/10
13.75

Qty:

50-15
Highest Grade V1 Mica Discs, 15mm
pkg/10
15.85

Qty:

50-20
Highest Grade V1 Mica Discs, 20mm
pkg/10
21.75

Qty:

Highest Grade Mica Sheets

Highest quality Grade V1
0.15 to 0.177mm (.006-.007") thick
Sheets interleaved
Various sizes

Prod # Description Unit Price Order / Quote

56-15
Highest Grade V1 Mica, 15 x 15mm (0.59 x 0.59")
pkg/10
$15.50

Qty:

56-25
Highest Grade V1 Mica, 25 x 25mm (1 x 1")
pkg/10
25.90

Qty:

56
Highest Grade V1 Mica, 25 x 75mm (1 x 3")
pkg/10
36.50

Qty:

56-75
Highest Grade V1 Mica, 50 x 75mm (2 x 3")
pkg/10
59.50

Qty:

56-100
Highest Grade V1 Mica, 100 x 75mm (4 x 3")
pkg/5
95.85

Qty:

Hi-Grade Mica

Grade V2
0.23 to 0.3mm (.009 - .012") thick
Sheets interleaved
Various sizes

Prod # Description Unit Price Order / Quote

52-15
Hi-Grade Mica, Grade V2, 15 x 15mm (0.59 x 0.59")
pkg/10
$13.50

Qty:

52-25
Hi-Grade Mica, Grade V2, 25 x 25mm (1 x 1")
pkg/10
14.90

Qty:

52-6
Hi-Grade Mica, Grade V2, 25 x 25mm (1 x 1")
pkg/20
23.50

Qty:

52-19
Hi-Grade Mica, Grade V2, 25 x 75mm (1 x 3")
pkg/10
47.50

Qty:

52-75
Hi-Grade Mica, Grade V2, 50 x 75mm (2 x 3")
pkg/10
72.50

Qty:

PELCO^® Mica Sheets, Grade V5

Various sizes available, presenting many fresh, clean surfaces for such EM applications as carbon filming and particle spraying. Thickness, 0.23mm (.009").
See Quality Classification of Muscovite Mica Based on Visual Properties

Prod # Description Unit Price Order / Quote

53-15
PELCO® Mica Sheets, Grade V5, 15 x 15mm (0.59 x 0.59")
pkg/10
$7.80

Qty:

53-25
PELCO® Mica Sheets, Grade V5, 25 x 25mm (1 x 1")
pkg/10
10.60

Qty:

54
PELCO® Mica Sheets, Grade V5, 10 x 40mm (0.39 x 1.57")
pkg/100
27.80

Qty:

53
PELCO® Mica Sheets, Grade V5, 25 x 75mm (1 x 3"),
pkg/20
15.20

Qty:

52
PELCO® Mica Sheets, Grade V5, 50 x 75mm (2 x 3"),
pkg/10
16.80

Qty:

silicon chip supports for scanning electron microscopy

Silicon Chip Specimen Supports

low background specimen supports for SEM viewing

Si-chips are opaque, of low electrical resistance and have surface properties equal to glass (including smoothness). They are also good substrates for growing or mounting cells. Si-chips are precleaned before packaging. Also ideal for imaging small particles due to low background signal.

Availability: 4" wafer is precut into 5x7mmm, 5x5mm or 10x10mm chips that can be easily separated in the laboratory.

4" wafer precut into 5x7mm chips approximately 187 chips/wafer.
4" wafer precut into 5x5mm chips approximately 270 chips/wafer.
4" wafer precut into 10x10mm chips approximately 55 chips/wafer.

Properties:
Orientation: <111>
Resistance: 1-30 Ohms
Type: P (Boron) (1 primary flat)
No SiO2 top coating
Wafer thickness: 18-21 mil (460-530µm)
Wafer is polished on one side
Before dicing they are rinsed in de-ionized water for cleaning

courtesy K.R. Peters
Peters, K.R., 1985. Working at higher magnifications in scanning electron microscopy with secondary and backscattered electrons on metal coated biological specimens and imaging macromolecular cell membrane structures. Scanning Electron Microscopy, IV:159.
Apkarian, R.P., High-resolution signal detection of specimen-specific secondary electrons in an analytical SEM, "Proc.. 44th Ann. Meeting of the EMSA", 1986, G.W. Bailey, Ed., San Francisco Press, 658.

Prod # Description Unit Price Order / Quote

16007
4" (10cm) dia., 5x7mm diced Silicon Wafer, 187 chips/wafer,
each
$76.90

Qty:

16008
4" (10cm) dia., 5x5mm diced Silicon Wafer, 270 chips/wafer
each
76.90

Qty:

16006
4" (10cm) dia., 10x10mm diced Silicon Wafer, 55 chips/wafer
each
76.90

Qty:

2", 3", 4" and 6" Silicon Wafers

These 2", 3", 4" and 6" diameter silicon wafers can be used either as a substrate for thin film research or to make small silicon substrates by dicing the wafer into smaller pieces using a scriber and the Wafer Cleaving / Glass Breaking Pliers. The wafer is shipped in a wafer carrier.

Wafer Mounting Film

Properties:
Orientation: <111> or <100> for 6" wafer
Resistance: 1-30 Ohms
Type P: (Boron) (1 primary flat)
No SiO2 top coating

Wafer thickness:

Ø2" = 9 - 13 mill (230-330µm)
Ø3" = 13.6 - 18.5 mill (345-470µm)
Ø4" = 18.7 - 22.6 mill (475-575µm)
Ø6" = 23.6 - 25.2 mill (600-690µm)

TTV: = <20µm
Wafer is polished on one side

Prod # Description Unit Qty Price Order / Quote

16012
Ø2" Silicon Wafer, Type P / <111>
each
1-9
$26.75

Qty:

10+
24.50

16013
Ø3" Silicon Wafer, Type P / <111>
each
1-9
28.30

Qty:

10+
25.90

16010
Ø4" Silicon Wafer, Type P / <111>
each
1-9
42.60

Qty:

10+
38.80

16015
Ø6" Silicon Wafer, Type P / <100>
each
1-9
57.60

Qty:

10+
52.80

Ultra-Flat 6" Silicon Wafer

Ultra-Flat 6" Silicon Wafers

Ultra-Flat 6" diameter silicon wafer for demanding substrate studies. Can also be used as substrate for AFM or SEM samples by dicing the wafer into smaller pieces using a scriber and the Wafer Cleaving / Glass Breaking Pliers. The 6" ultra-flat silicon wafer is shipped in a 6" wafer carrier.

Properties for 6" (150mm)ultra-flat wafer:
Orientation: <100>
Grade: Prime / CZ Virgin
Resistivity: 1-10 Ohm/cm
Type: P / Dopant: Boron
Wafer Thickness: 675 +/- 25µm
TTV: <= 1.5µm
Warp: <=30µm / Bow: <= 30µm
Particles: <= 30@>=0.2µm
Front surface: Polished
Back Surface: Etched
Flat: 1 per SEMI Standard (flat length 57.5 ±2.5mm)
Roughness: Typical 2-3 Å

Prod # Description Unit Price Order / Quote

21610-6
ø6" Ultra-Flat Silicon Wafer, Type <100>
each
$99.75

Qty:

Ultra-Flat 6" SiO2 Wafer

5 x 5mm SiO2 diced wafer

5 x 5mm Diced Ultra-Flat Wafer

Ultra-Flat Thermal SiO2 Substrates

The Ultra-Flat SiO2 substrates consist of a 200nm thermally grown SiO2 film on an ultra-flat silicon wafer. SiO2 is one of the most characterized materials and is widely used in semiconductor manufacturing, thin film research and as substrate for growing cells. It can be directly used as substrate for AFM and SEM imaging. The ultra-flat thermal silicon dioxide substrates are available in 6" wafer and conveniently diced 5x5mm. 5x7mm and 5x10mm chips. The 6" wafer is shipped in a 6" wafer carrier, the 5x5mm diced pieces are shipped in a Gel-Pak box. The special clean dicing process involves coating the wafer with photo resist before dicing and removing it after dicing which produces debris-free SiO2 substratres. All products are packed in class 10 clean room conditions.

Properties for thermal SiO2 substrates:
Orientation: <100>
Grade: Prime / CZ Virgin
Resistance: 1-50 Ohm/cm
Type: P / Dopant: Boron
Wafer Thickness: 655-695 µm
TTV: <= 7µm / STIR: <= 1.0µm
Warp: <=40µm / Bow: <= 40µm
Particles: <=20@>= 3.0µm
Front surface: Polished
Back Surface: Etched
Flat: 1 per SEMI Standard (flat length 57.5+/12.5mm)
Film: 200nm +/- 5% Thermal Oxide (SiO2)
Size: 6" (150mm) diameter wafer or 5x5mm diced
Roughness: Typical 2-3 Å

Prod # Description Unit Price Order / Quote

21620-6
200nm Thermal Oxide on ø6" Ultra-Flat Wafer, Type <100>, in 6" wafer carrier
each
$198.75

Qty:

21620-55
200nm Thermal Oxide on 5x5mm diced Ultra-Flat Wafer, Type <100>, in Gel-Pak box
box/25
135.50

Qty:

21620-57
200nm Thermal Oxide on 5x7mm diced Ultra-Flat Wafer, Type <100>, in Gel-Pak box
box/18
135.50

Qty:

21620-510
200nm Thermal Oxide on 10x10mm diced Ultra-Flat Wafer, Type <100>, in Gel-Pak box
box/6
135.50

Qty:

4" Gold Coated Silicon Wafer
held by Carbon Wafer Tweezers
2" Gold Coated Silicon Wafers

2" Gold Coated Silicon Wafer
in wafer carrier

PELCO^® Gold Coated Silicon Wafers

2" and 4" gold coated silicon wafers, useful for a variety of applications such as SEM or AFM supports, nanotechnology and biotechnology. Both Cr and Au are evaporated on the silicon wafers using a vacuum evaporation system with chromium between the glass and the gold to serve as an adhesion layer. The gold surface is not atomically flat, but has bumps in the nm range. The wafers are packed and shipped in a wafer carrier. Au coating should be stable to about 175° C; above that temperature delamination could occur.

Specifications:
Wafer: thickness 460 - 530µm, <111> orientation, P-type
Chromium adhesion layer thickness: 5nm
Gold layer thickness: 50nm (± 5nm)
Diameter: 2" or 4"

Prod # Description Unit Price Order / Quote

16012-G
Gold Coated Ø2" Silicon Wafer, 50nm Au on 500µm P-type <111> Si wafer
each
$89.50

Qty:

16010-G
Gold Coated Ø4" Silicon Wafer, 50nm Au on 500µm P-type <111> Si wafer
each
198.50

Qty:

Silicon Nitride Disks for SEM, FESEM, AFM

Silicon Nitride Blank

Silicon Nitride Coated 3mm Discs (blanks)

These 3mm silicon discs have an ultra flat (RA of 0.45 ±0.02nm) 50nm ultra low stress silicon nitride layer (Si3N4) on both sides and can be used for a number of applications:

Specimen mounts for SEM and FESEM applications
Specimen discs for AFM applications which need a Si3N4 background
Blanks to build the PELCO^® Liquid Cell™ together with the PELCO® Silicon Nitride Membrane

more information on silicon nitride support films

Product Specifications

Film thickness: 50nm ultra low stress Si3N4 on both sides
Disc thickness: 200µm silicon support
Disc diameter: 3mm
Surface roughness: The RMS (Rq) is 0.65 +/- 0.06nm which gives a mean roughness (Ra) of 0.45 +/- 0.02nm
Packaging The PELCO^® Silicon Nitride Discs are packaged under cleanroom conditions in a vial holding 10 discs.

MSDS (PDF - 367KB)

Prod # Description Unit Price Order / Quote

21555-10
PELCO^® Silicon Nitride Ø3mm Disks
vial/10
$95.00

Qty:

Single Crystal Substrates (NaCl, KBr and KCl)

High purity, optical grade single crystals of sodium chloride (NaCl) MSDS, potassium bromide (KBr) and potassium chloride (KCl) form excellent substrates to grow epitaxial films. The orientation of the vacuum coated thin films is directly related to the orientation of the single crystal substrate thereby creating single crystal films. Ideal for thin film research, education and studies of properties of single crystal films.

All three materials are supplied with (100) orientation with a crystal size of 10 x 10 x 10mm in packs of 5. For most applications it is advisable to use freshly cleaved substrates. The cleaved surfaces produce atomically flat areas; however, cleavage steps over different atomic planes should be expected.

Prod # Description Unit Price Order / Quote

46-2
NaCl Crystals, 10 x 10 x 10mm
pkg/5
$35.90

Qty:

46-6
KBr Crystals, 10 x 10 x 10mm
pkg/5
43.50

Qty:

46-8
KCl Crystals, 10 x 10 x 10mm
pkg/5
37.50

Qty:

PELCO^® Quartz Substrate Discs

The PELCO^® quartz discs or wafers are made from high quality fused quartz (Technical data on GE 124 Quartz) ground and optical-grade clear polished on both sides. The discs are ideal as substrates for thin film research and are also suitable for optical research. These quartz wafers have excellent chemical resistance against a wide variety of solvents. They have also excellent heat resistance with high dimensional stability over a wide temperature range. Transparency is provided for 0.19 to 4.2µm with very low absorbance in the 0.26 to 2.6µm range. Surface flatness is ±1 degree with 60/40 scratch/dig specifications. Available in sizes from 1" to 4" diameter with thickness of 1/16" and 1/8".

Wafer Carriers
Quartz Micro Slides
Vacuum Evaporation Supplies

Prod # Description Unit Price Order / Quote

16001-1
Quartz Disc, Ø1" x 1/16", polished
each
$6.80

Qty:

16001-2
Quartz Disc, Ø1" x 1/8", polished
each
8.50

Qty:

16002-1
Quartz Disc, Ø2" x 1/16", polished
each
13.25

Qty:

16002-2
Quartz Disc, Ø2" x 1/8", polished
each
15.85

Qty:

16002-52
Quartz Disc, Ø2.5" x 1/8", polished
each
18.80

Qty:

16003-1
Quartz Disc, Ø3" x 1/16", polished
each
22.25

Qty:

16003-2
Quartz Disc, Ø3" x 1/8", polished
each
24.60

Qty:

16004-1
Quartz Disc, Ø4" x 1/16", polished
each
65.50

Qty:

16004-2
Quartz Disc, Ø4" x 1/8", polished
each
73.65

Qty:

PELCO^® Gold Coated Microscope Slide and Coverslips

High quality glass, standard microscope slide or coverslips coated with 50nm of gold with a 5nm chromium adhesion layer between the glass slide surface and the gold coating. Can be used for a wide range of nanotechnology, biotechnology and AFM applications and is also suitable of an opaque microscopy support. Both Cr and Au are evaporated on the glass slide using a vacuum evaporation system. The gold surface is not atomically flat, but has bumps in the nm range. The gold slides are individually packed in a slide mailer. The gold slides are autoclavable.

Specifications:
Glass slide: 75 x 25mm , 1mm thickness, soda lime glass
Round coverslip: Ø15mm, #1 thickness (0.13-0.16mm), Schott D263M Boro-silicate Glass
Square coverslip: 22 x 22mm, #1.5 thickness (0.16-0.19mm), Schott D263M Boro-silicate Glass
Chromium adhesion layer thickness: 5nm
Gold layer thickness: 50nm (+/- 5nm)

PELCO® Pro Gold Plated Tweezers

Prod # Description Unit Price Order / Quote

26002-G
Gold Coated 75 x 25mm Microscope slide, 50nm Au
each
$55.40

Qty:

26024-G
Gold Coated Ø15mm Coverslip, 50nm Au
each
32.50

Qty:

260148-G
Gold Coated 22 x 22mm Coverslip, 50nm Au
each
32.50

Qty:

Mica and Single Crystal Substrates Silicon Chip Specimen Supports and Wafers Gold Coated Silicon Wafers, Slides and Coverslips