DE1519922A1 - Method and apparatus for pulling crystals from a crucible - Google Patents

Description

Method and device for pulling tos'Erlets from a melting pot

Me invention relates to a method and others a © to pull τοη rod-shaped »crystals sue .crucible by means of an immersed in the melt and extracted lapfkeimes · Sigfeesoaäfs? © i®

the? ®yfahren suitable for the Zietien ψ & ά from serious connections, s * B «OsAg Usä _9i . in which the one Kimponente aa iüslnelspsiörl des? ¥ ei? BiBdiBig see a deserved Bsiipfdssia © !: .fe @ ®its ^ _e

Ub @ ZUohten fön crystals "to the set of 2 & lleh © E & with the help of the well-known crucible-free rides © inige Sohwlerl ^ keitesi. We
Iron Defined Steamed Steam

h & lt @ n _y and is a consequence of the

the Seliael sauce to succeed H stabtss (.s * B · 6; "up to 7 M $.! Del. GeJLs)

!Juice

dl © phase boundary fsst ^ fltteiges- along the Iim, mmms & - a® -Selilffchens- or seal «Is consists .Kristall® tos the Eiegelwazid Ib dea Eiste! stall Mm sea © also exercises the Sieg ^ lwand- an aegatiY © E lisil ^ ß sm £ the crystal perfection and the limb; öeg

The well-known.Cz-o.ch2tel6ki ~ Ver £ ahren ₉ b @ i-wel · germ ia the 'i> stee * i§ @ <; and the sinking crystal is gradually removed.

st

' _{Suitable 9} - thicker and larger crystals to lias - succeeds ₉ dan partial drawing of the gaseous'component' to keep constant · However, the problem of sealing the guide 'of the' pull rod and the like is "difficult to accommodate?"

009811/1148 " ² "

BATH ORIGINAL

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BATH ORIGINAL

One came to this process by increasing the orehsahl control by hand; but one can also calculate the change in the turning speed empirically once the viewing parameters have been set and then let it run automatically, since the relationship between the turning tool η (g / min) and the sloh setting from » lowered height h In the middle of the aisle is described by the equation *

in - Wi fa ² _r

H · Auegangshehe the aisle S «crucible radius g · Brdbesohverbindungen and

r ■ bath of the sucked crystals · assuming a cylindrical fozn ·

She is known to cause Surohmisohung the aisle through Rotation of the crucible with the Xsipfkeia (or reversed) occurs automatically with the new process a fiadlalstrfivung, and sner both in theoretical as well as In high & isoher respects

A device is suitable for office work nlt a vacuum-tight τβτ β chi i edible and duroh an adjustable drive about its vertical axis in rotation, which in a lower part has a duroh a hot spring that can be heated up, with relatively high side walls and in its upper part one in the hotetioneechee in the vessel attached holder for a bottle contains

00981 1/1 U 8 * BAÄ ORIGINAL

Further Blnselhelten de · procedure and the Torrlohtamg he » give eioh · the following Besohrelb & g eleventh · Ia of the I. Drawing shown Ausitthrungebeieplelee of Torrlohtwig "

SIn Yorsugswelse an · Quars existing, rotatlotissjwetrlsolLsr Beilpient 1 1st above with a Beekel 2 closed vacuum-tight · Br 1st mounted on the bottom on a Split 3 and via a rotatlotissjwetrlsolLsr mounted on the Deoktl 2 and rotatably mounted in a suitable position 4 with an adjustable drive * » * »Direction in rotation are rectilinearly ₉ as indicated by the ff eil A · in its lowest point in the Reslpleates a Sohmelstiegel 5 is inserted, which can be heated by an induction coil 6 that can be moved up and down in the direction of the double arrow B« Ia top coat of the Ieslpienten 1 is a Binsats 7 hooked ₉ whose ter _t rohrfOraiger 4nsats 1st designed as a holder for the lapfkeiM 8 "Ben upper rope Beslpienten 1 unsohlleBt a furnace 9 · at the point of the lowest Teaperatur ₉ welohe SiOH represents at Absohaelskaplllare 10 is located, 1st Inaerhall) of the lohse 4 ei »Thernoeleaent 11 on the regulation of the Teaperatur la Oasrau · 12 and thus on the setting of the BartialdsM pfdruokes of the liquid component (soil body 13) browned

The method according to the invention runs roughly in the torque direction as follows abs

Vaoh the pollen of the sole 5 with a certain amount of the starting material it C ** B · GaAs) ₉ which relieves ₉ aa la sobnoled state let the XeIa submerge somewhat ₉ «lsi of the slnsats 7 with the soil body 13, which is a branch of the tartial pressure the volatile component is used _{9 in a} set-up manner.

Now the recipient 1 can be built into the drive unit become «Bas Anfsohaelsen soled happy old the Br- V

BATH ORIGINAL. 009811/1 U8 ---, _ »5 -

1519922 heating of the Gesraumee 12 by the furnace 9 to the temperature required to generate the vapor pressure of the volatile component (approx. 620 ° C for GeAe) ₉ measured by the thermocouple 11 ·

The gas space 12 protrudes with the surface of the melt 14 Holes 15 in connection · This ensures a certain equilibrium vapor pressure above the melt 14 ·

Then the drawing process begins by increasing the speed of the entire system, which causes the surface of the melt to be lowered in the center of the crucible »The melt 14 is automatically mixed in the direction of the Arrows C.

The method is also suitable for doping materials with a defined amount of doping material, which already heavily evaporated at the melting point of the starting material PaB doping material then takes the place of the soil body or is added to it

BATH ORIGINAL 009811 / 1U8 -

Claims (1)

· Procedure for pulling tob crystals *, Torsagsveis »XoM ait a volatile component, s ·! · (IsU Ism iwiwiti «ft · • Inte Sohmelstiegel, means of an is di gektnnitiohntt, d * 0 di · B «l * tlfb« vt0 Impfktlii and ObcrflMoh · der 8ο1μ · 1β · dnroh kontiaaierlloh ^ eeteigtrtt Eotatlon des Sohmelstiegele and de · Xhipfkeiae · erseugt idrd. 2 device for the implementation of the experienced person naoh Ansprooh 1, known without a TBkunedioht rw- Bohliefiberen and by an adjustable drive around its vertical axis in botation rereeteberen leeipients, which in its lower part a hot source arranged by an out-of-the-way dee eesipient, Crucible with a relatively high side wall and in its upper part a holder IUr arranged in the botatlonsaohse contains an apple seed protruding into the bed 3 · Device according to claim 2, characterized in that the lesipient has a Yorsugswelse bit the inoculant connected üneatB for absorbing material containing a highly volatile component 4 · Device according to claims 2 and 3, characterized without t by the upper area of the sample giving furnace " 0098 U / 1 U 8 ^{BAD 0RIGINAL}