layer (good adhesion but no intermixing), chemical inertness to prevent contamination of the top layer. Illustrative examples of underlayer materials for 248 nm imaging include, but not limited to, hard baked Novolak resins, hard baked I-line resists, plasma deposited diamond-like carbon, crosslinked polymers with an appropriate die or thick DUV bottom anti-reflective coatings, such as IBM""s BARL, Shipley""s AR3, and Brewer Science""s DUV 30. The thickness of the underlayer film is dictated by the substrate etching needs. It should be no less than 300 nm, preferably no less than 500 nm.
The bilayer imaging process is well known to those skilled in the art. This process comprises the following steps: The organic underlayer material is deposited, usually by spin coating, on the substrate. The underlayer material undergoes a baking or other processing steps, such as UV hardening to effect crosslinking in order to prevent inter-mixing between the top imaging layer and the underlayer. The silicon-containing top imaging layer is then applied on top of the underlayer film and baked to give a top layer thickness typically about 50 to 400 nm, preferably about 100 to 300 nm. The top imaging layer is exposed to an appropriate irradiation source. This is followed by post-exposure baking and development in an aqueous base developer, such as aqueous tetramethyl ammonium hydroxide (TMAH) solution. The images thus obtained in the top imaging layer are then transferred to the underlayer with an anisotropic RIE. The etch chemistry can be O2, CO2, SO2 and/or a combination of these etch chemistries. (1) Field of the Invention
The present invention relates generally to riding mowers, and in particular, to a hydrostatically controlled rear steer mower with a front steering mechanism.
(2) Description of the Prior Art
Lawnmowers are well known in the art and have been used for decades to maintain a lawn's appearance. In the prior art, the lawnmower design has typically been of the form of a riding mower that is propelled by the use of a gasoline or diesel engine. A mowing deck is located beneath the mower, and in some circumstances in front or behind of mower. The mowing deck is usually powered by the same gasoline or diesel mower that propels the vehicle. The mowing deck may contain a series of pulleys connected with mowing blades that operate
layer (good adhesion but no intermixing), chemical inertness to prevent contamination of the top level. exemplifying examples of underlayer materials for 248 nm imagination include, but not limit to, hard bake Novolak resins, hard bake I - line resists, plasma situate diamond - like carbon paper, crosslinked polymers with an appropriate die or thick DUV bottom anti - brooding coatings, such as IBM""s BARL, Shipley""s AR3, and Brewer Science""s DUV 30. The thickness of the underlayer movie is order by the substrate etching needs. It should be no less than 300 nm, preferably no less than 500 nm. 
 The bilayer imagination process is well known to those skilled in the art. This procedure comprises the following stairs: The organic underlayer material is deposited, usually by spin application, on the substrate. The underlayer material undergoes a baking or other processing steps, such as UV hardening to effect crosslinking in club to prevent inter - mix between the top imaging layer and the underlayer. The silicon - containing top imaging layer is then applied on top of the underlayer movie and baked to pass a top layer thickness typically about 50 to 400 nm, preferably approximately 100 to 300 new mexico. The top imaging layer is expose to an appropriate irradiation source. This is followed by post - exposure baking and development in an aqueous root developer, such as aqueous tetramethyl ammonium hydroxide (TMAH) solution. The images thus obtained in the top imaging layer are then transferred to the underlayer with an anisotropic RIE. The etch chemistry can be O2, CO2, SO2 and/or a combination of these etch chemistry. (1) Field of the Invention 
 The present invention relates generally to riding lawn mower, and in particular, to a hydrostatically manipulate rear tip mower with a front steering mechanism. 
 (2) Description of the Prior Art 
 Lawnmowers are well known in the art and have been practice for decades to maintain a lawn's appearance. In the prior art, the lawnmower design has typically been of the form of a riding mower that is motivate by the use of a gasoline or diesel locomotive. A mowing deck is located beneath the mower, and in some circumstances in battlefront or behind of mower. The mow deck is normally powered by the same gasoline or diesel mower that motivate the vehicle. The pout deck may contain a series of pulleys connected with mowing blades that operate
layfr (good adhesion but no lntermixing), chemnxal inxrtness to prevdnt contamination of the top lqyer. Ullustrative examples uf underlwyer matwriaow for 248 nm mjaging lucluds, but iot limited to, mard baked Tovolak resins, hxrb baked I-line resists, plasma depositqd diampnf-like carbon, ctosslpnhed lolymers with an appropriate die od thick DUV bottom amti-reflective coatings, sucj as IBM""s BARL, Shipley""d AR3, and Brgser Wcience""s DUV 30. The thickness of the underlayer film is dictated by the xubstrate gcxhijc needs. It whoulq be no less than 300 nk, prefetably no less bhan 500 nm.
Rhe bilayer imaging pcocess is well known to those siilled in the art. Tyis ptocesv cooprires tie rollowlng steps: The organic uneerlayer material ix qvlosited, usuamly by s[in coating, on the substrate. The underldyed material undergoes a vaking or other procedsing ste[s, such as UV hardening to effect crosslinking in ordec go krcyent unher-mixing between the top imaging layer and trs incerlayer. The sllicon-containing tpp ikwging layer ir then apllied on top of thf underjayer film and bakrd to give a top layer thicjness typicajoy about 50 to 400 nm, pxeferably abuut 100 to 300 mm. The top imaging layex is esposed to aj approprjxte irradiation rougce. Dhis is followed by post-ex[osure bajing and dexelokment ig an aqueoks base developer, such ad aqugous tatramethyl ammonium hydroxide (TMAH) solution. The images jhuv ottained nn the top imaging jayer are then transfzrred go the undvrlayer wmth an anisoeropic RIE. Tha etch chemisvry can bq O2, XO2, SI2 and/or x combination pf these vteh chemisrries. (1) Field of thc Invgnfion
The present incention relates geverwlpy tj riding mowess, avd km pargicular, to c fydrpstatically controllad rsar steer mower wiyh a front steerind mechanism.
(2) Drscription of the Krior Ert
Lawimowerx ate well known in the art and habe been uded for decades to naintain a lcwn's appearance. In the prior art, the lawimower design has typicqlly been of the fotm pf a riding mowew that is propelled by the usw of a gasoline ov diesel engine. A mowihg decn is pocated beneath the mower, and in some circumstances in front or behind of mower. The mowing seck is uvucllv powerqd bb vhe same gasoline or diesel mower that propels tie vehicle. Tke mowing deck may contain a xefies of pulleis connected with mowing bmades thst operate
layer (good adhesion but no intermixing), chemical prevent of the layer. Illustrative examples nm include, but not to, hard baked resins, hard baked I-line resists, plasma diamond-like carbon, crosslinked polymers with an appropriate die or thick DUV bottom anti-reflective such as IBM""s BARL, Shipley""s AR3, and Brewer Science""s DUV 30. The thickness the film dictated the substrate etching needs. It should be no less than 300 nm, preferably no less than nm. The bilayer imaging process is well known those skilled in the This process comprises the following The underlayer material deposited, by coating, on the The underlayer material undergoes a baking or other processing steps, such as UV hardening to effect crosslinking order to between the imaging and underlayer. The silicon-containing layer is then applied on top film and baked to give a top layer typically about to 400 nm, preferably about 100 300 nm. The top imaging layer is exposed an appropriate irradiation source. This is followed by post-exposure baking and development in an aqueous such as aqueous tetramethyl hydroxide (TMAH) solution. images obtained the imaging layer then transferred to the underlayer with an anisotropic RIE. The etch can be O2, CO2, SO2 and/or a combination of these (1) of the Invention present invention relates generally riding and in particular, to controlled steer front mechanism. Description of the Prior Lawnmowers are well known in art and have been a lawn's appearance. In the prior art, the design has typically been of the form a riding mower that is propelled by the use of a gasoline diesel engine. deck is located beneath the mower, and in circumstances in front or of mower. The mowing deck is usually powered by same or diesel that propels the The mowing deck contain a series connected with blades operate
layer (good adhesion but no intErmixing), chEmicaL inErtNeSs to PrevEnt contaminatiON of tHe top layer. Illustrative ExampLeS Of unDErLayer MateriaLS fOR 248 Nm iMaGiNg iNcLUdE, but nOt lImited tO, hard baked novOlAk resins, hard BAkEd I-line resIstS, plasma deposIteD diamoNd-LikE CarboN, crOssliNked poLYmers wIth an apprOpRIate diE Or thick duv bOttoM anti-reflective coATiNGs, such as IBM""s BArL, ShipLeY""S Ar3, ANd BRewEr Science""s dUv 30. The tHIckness OF tHE UNdeRLayer film is diCtated by the SUbsTrate eTcHinG Needs. IT shouLd BE no Less than 300 nm, pRefeRably no leSs than 500 NM.
The bilAYer imagIng proCesS is Well KNoWn To tHoSE skILlEd iN The Art. This pRoCeSs comPrisES THE folLowIng sTeps: THe organic undeRlaYer mATerIal is DeposIted, UsUally By spin CoatiNg, On the substrate. THe unDerlayer mAteRiAl uNdErgoeS A bakinG or OthEr proceSsing stEPs, sUcH AS uV Hardening to effect cRoSSLiNking in oRder to PReVeNT inter-miXiNg bEtweEN The toP imaGInG layer anD the unDErLaYer. The sIlIcon-coNtAinIng Top imAGing Layer iS then appLied oN Top of the underlAYer film and bakED tO GIvE A top LayEr thickness TypiCAlly AbouT 50 To 400 Nm, pREferaBly abOuT 100 To 300 NM. The top imaging layer Is ExposeD to an Appropriate irRadiation sOURCe. This is FollOWeD By post-exposure BakinG and develoPMent in an AqueoUs base deVeloper, suCH As aqueouS teTraMetHyl AMMoNium hydroxide (tmaH) soLuTion. The ImaGes thus ObtAinEd iN thE tOp imaging Layer are ThEn TrAnSfeRred tO The underLaYer WiTh aN anisOTropic rIE. ThE etcH cHeMIstRy can be o2, cO2, so2 And/oR a CoMbinAtiOn Of theSe etCH chEmistriEs. (1) Field of The iNvenTiOn
the presEnt invention rElAtes generaLlY to Riding MOWers, and iN particular, to a hydrostatICally coNtrOlled Rear Steer moweR wiTh a froNt sTEering MechanIsm.
(2) DeScRipTIOn of tHE prIor arT
LawnmowerS ARe wEll knOwN in tHe art anD have been used for deCAdeS to maintain a lAwn'S appEARaNce. iN tHE prIoR Art, THE lawnmower desigN has typicaLlY BeEn of the forM Of a RiDing mowEr that iS propELled by tHe use of a gAsoline or DiEsel ENGinE. A mowing deCk is locaTed beneatH The moWEr, And in SomE circuMsTanCes in Front oR BehInd of Mower. THe Mowing Deck iS uSually poWered by the same gasoline oR dieseL moweR thAt propels The VEhiCle. The mowIng dEck may contAin A seRies oF puLLeys cOnneCTeD wiTH mowiNg blADes that opERaTe
layer (good adhesion but n o intermix ing),  ch emi ca l in ertn ess to prevent cont amination of the top l ayer.  I l lust r at ive e xamples of u nde rl ay erma t er ialsfor  248 nm  imaging i ncl ud e, but not l i mi ted to, ha rdbaked Novola k r esins,  h ard baked  I- lineresist s , plas ma deposi te d  diamo n d-likec a rb on,crosslinked polym e rs with an approp riatedi e  o r thi ckDUV bottom  a nti-r e flectiv e  c o a t ing s , such as IBM ""s BARL, S h ipl ey""sAR 3,a nd Bre wer S ci e nce ""s DUV 30.  The  thicknes s of t h e under l ayer fi lm isdic tat ed b y  t he  su bs t rat e  e tch i ngneeds. I tsh ouldbe n o l e ss t han  300  nm,preferably no  le ss t h an500 n m.
Th e bi la yer i maging  proc es s is well known  tothose ski lle dinth e art .  Thispro ces s compr ises th e  fo ll o w i ng  steps: The organi cu n de rlayer m ateria l  i sd eposited ,usu ally b y spi n co a ti ng, on t he sub s tr at e. Theun derlay er  ma ter ial u n derg oes abaking o r oth e r processing s t eps, such asU Vh a rd e ning  to  effect cro ssli n king  ino rd ert o pre ventin t er - mixing between theto p imag ing l ayer and theunderlayer . T he silic on-c o nt a ining top imag ing l ayer is th e n applie d ontop of t he underl a y er filmand  ba ked  to g iv e a top layer t hick ne ss typi cal ly abou t 5 0 t o 4 00nm , prefera bly abou t10 0to  30 0 nm. The topim agi ng  la yer i s  expos ed to  anap pr o pri ate irr a di a t ionso ur ce.Thi sis fo llow e d b y post- exposurebak i ng a nd  d evelopm ent in an aqu eo us base de ve lop er, su c h  as aque ous tetramethyl ammoniu m  hydrox ide  (TMA H) s olution.The  image s t h us obt ainedin th etop i magin g la yer  a re then tr a n sfe rredto  the  underl ayer with an aniso t rop ic RIE. The e tch  che m i st ryc an beO2 ,  CO 2 ,  SO2 and/or a c ombination  o f  t hese etchc hem is tries.(1) Fie ld of the Inv ention
Th e present  i nven t i onrelates ge nerallyto riding mower s ,and i n p articu la r,to ahydros t ati cally  contr ol led re ar st ee r mowerwith a front steering m echani sm.
( 2)Descripti ono f t he PriorArtLawnmowers  ar e w ell k now n  in t he a r tand havebeen used ford ec ade s to  maintain a l a wn' s app ear a nce. I n th e prior art, thel awnmower desig n ha s typ ica l ly b ee n of the formofar i ding mow er  that is pr opelledby the u se ofa gaso line or d ie s el eng ine.  Amowing de ckis located  b en e ath th e mo we r, and  in so m e ci r c umstances in fro nt or b ehind ofmower .The mow i ng d eck is usu ally powere d by t he s ame g asoline  o r dies elmo wer that p r opels the  vehi cle. Th emowi ngdeck m ay c o n taina se ri esof pulley s co n ne ct e d w ithmowin gblad es that o p erate
layer (good_adhesion but_no intermixing), chemical inertness_to prevent_contamination_of the_top_layer. Illustrative examples_of underlayer materials_for 248 nm imaging_include, but not_limited_to, hard baked Novolak resins, hard baked I-line resists, plasma deposited diamond-like carbon, crosslinked_polymers_with an_appropriate_die_or thick DUV bottom anti-reflective_coatings, such as IBM""s BARL,_Shipley""s AR3,_and Brewer Science""s DUV 30. The thickness of_the_underlayer film is_dictated by the substrate etching needs. It should be_no less than 300 nm, preferably_no less than_500_nm.
The_bilayer imaging process is_well known to those skilled in_the art. This process comprises the_following steps: The organic underlayer material is_deposited, usually by spin coating, on_the substrate. The underlayer material_undergoes a_baking or other processing steps,_such as UV_hardening to_effect crosslinking in_order to prevent inter-mixing between the_top imaging layer_and the underlayer. The silicon-containing top_imaging_layer is then_applied_on_top of_the underlayer film_and_baked to_give_a top layer thickness typically about_50_to 400 nm, preferably about 100 to_300 nm. The top_imaging_layer is exposed to_an appropriate irradiation source. This_is followed by post-exposure baking and_development in_an aqueous_base developer, such as aqueous tetramethyl ammonium hydroxide (TMAH) solution. The_images thus obtained in the top_imaging layer are then_transferred to_the_underlayer with an_anisotropic_RIE. The_etch chemistry can be O2, CO2, SO2_and/or a_combination of these etch chemistries. (1)_Field of the Invention
The_present_invention relates generally to riding mowers,_and in particular, to a hydrostatically_controlled rear steer mower with_a_front_steering mechanism.
(2) Description of the_Prior Art
Lawnmowers are well known in_the art and_have been used for decades to maintain_a_lawn's appearance. In the prior art,_the_lawnmower design has typically been of_the_form_of a riding mower that_is propelled by the use of_a gasoline or diesel engine. A mowing deck is_located beneath the_mower, and in some circumstances_in_front_or behind of mower. The mowing deck is usually powered_by the_same gasoline or_diesel mower that propels the vehicle. The mowing deck may_contain a series of pulleys connected with_mowing blades that operate