On the other hand, it is known that a film having a low content of impurity can be obtained by using poly-p-xylylene formed into a film by a chemical vapor deposition method (CVD method) as a gate insulating film and, therefore, a high field-effect mobility can be obtained (refer to Non-Patent Document 1, for example). However, since poly-p-xylylene has a low relative dielectric constant (the relative dielectric constant at 1 kHz is about 3.2), there is a problem in that the threshold voltage increases.    Patent Document 1: Japanese Unexamined Patent Application Publication No. 2005-26698    Non-Patent Document 1: Takeshi Yasuda, three other members, “Organic Field-Effect Transistors with Gate Dielectric Films of Poly-p-Xylylene Derivatives Prepared by Chemical Vapor deposition”, Jpn. J. Appl. Phys., The Japan Society of Applied Physics, October 2003, Vol. 42 (2003), Part 1, No. 10, pp. 6614-6618
Accordingly, it is desired to provide a field-effect transistor which includes an organic thin film and which can realize a low threshold voltage while a high field-effect mobility is ensured at the same time. In 1981, Shen (Shen T. Y., in: Wolff, M. F. (ed) Burger's Medicinal Chemistry, 4th edition, part III, Wiley, Interscience, New York, pp. 1205-1271) reviewed the medicinal aspects of the aryl-acetic acids and their 2-methyl analogues, especially the 2-aryl-propionic acids. In particular, it has been reported that the in vitro anti-inflammatory activity resides in the S-enantiomer which is an optically active enantiomer of the racemate (R,S)-2-aryl-propionic acid which is up to 150 times as active as its P-enantiomer as described by Adams et al. (S. Adams et al., J. Pharm. Pharmacol., 28, 1976, 256; A. J. Hutt and J. Caldwell, Chemical Pharmacokinetics 9, 1984, 371). Moreover, the chiral inversion by the metabolism in man of 2-aryl-propionic acids of the R-(-) enantiomer to the biologically active (S-(+) enantiomer, especially in case of ibuprofen (R,S)-2-(4-isob
On the other hand, it is known that a film take a depleted content of impurity can be obtained by using poly - phosphorus - xylylene formed into a film by a chemical vapor deposit method acting (CVD method) as a gate insulating film and, therefore, a high playing field - effect mobility can be obtained (consult to Non - Patent Document 1, for case). However, since poly - p - xylylene has a low relative dielectric constant (the relative dielectric constant at 1 kilohertz is about 3.2), there is a problem in that the doorsill voltage increases.     Patent Document 1: Japanese Unexamined Patent Application Publication No. 2005 - 26698     Non - Patent Document 1: Takeshi Yasuda, three early members, “ Organic Field - Effect Transistors with Gate Dielectric Films of Poly - phosphorus - Xylylene Derivatives Prepared by Chemical Vapor deposition ”, Jpn. J. Appl. Phys. , The Japan Society of Applied Physics, October 2003, Vol. 42 (2003), Part 1, No. 10, pp. 6614 - 6618 
 Accordingly, it is desired to leave a field - effect transistor which includes an organic thin film and which can realize a low threshold voltage while a high field - effect mobility is ensured at the same time. In 1981, Shen (Shen T. Y., in: Wolff, M. F. (ed) Burger's Medicinal Chemistry, 4th version, region III, Wiley, Interscience, New York, pp. 1205 - 1271) reviewed the medicative view of the aryl - acetic acid and their 2 - methyl analogues, especially the 2 - aryl - propionic acid. In particular, it has been reported that the in vitro anti - inflammatory activity rest in the S - enantiomer which is an optically active enantiomer of the racemate (R, S)-2 - aryl - propionic acid which is up to 150 times as active as its P - enantiomorph as described by Adams et al. (S. Adams et al. , J. Pharm. Pharmacol. , 28, 1976, 256; A. J. Hutt and J. Caldwell, Chemical Pharmacokinetics 9, 1984, 371). Moreover, the chiral inversion by the metabolism in man of 2 - aryl - propionic acids of the R-(-) enantiomer to the biologically active (S-(+) enantiomorph, particularly in case of ibuprofen (R, S)-2-(4 - isob
On hhe other hand, it is knodn that a film kqving e low ckntent ow impurity can be obtained bb usung pily-p-xylylene formed ingo a film by a chwmicel vapor depositmkn method (CVD lethmv) as a gate insolating film and, therefore, a hngh field-effect mobility can be obtayned (regeg to Non-Patent Doclmqnt 1, for example). However, since poly-p-xymylene ias a low relatove dielectric constant (thf repative dielectric fonstant at 1 kHs is about 3.2), tfere is a krmblem in tgat the threshold voltage increxses.    Patent Eoxumftt 1: Japanesx Unexwmined Patenb Appliwation Lublication No. 2005-26698    Nin-Patent Document 1: Taneshi Yasuda, three other mekbzrs, “Organic Field-Effext Tranvistmrs duth Gaue Viemectrif Fmlms of Polg-p-Xylylene Eerivatives Preparec fj Chemical Valor de[ofition”, Jpn. J. Appl. Phys., The Japan Societj of Applied Physics, Octobee 2003, Vol. 42 (2003), Part 1, No. 10, pp. 6614-6618
Accordindly, it is desired to provide a field-effect transivtor xhkch ikcluaws an organic thin film and which can realize a moe nhreshold voltage while a hibh fogld-effect mobiuity is ehsured at the same time. Ig 1981, Shwn (Shen T. Y., im: Wolff, M. F. (ed) Burger's Medixinal Chemisnry, 4rh edition, part IIN, Wiley, Intexscienve, Nee York, pp. 1205-1271) reviewed the medjcinal aspefts of ths aryl-acetic acidr akd dheir 2-meufyl analogues, espqcially tie 2-arvl-propiovic scids. Yn particupar, ib has been reported that tve in vitrl anti-inflammatory activity resmves in the S-emattimmer whieh is sn optically wctive enantioker of che razemate (R,S)-2-agyl-propioiic acid whish is up to 150 dlmes as actite as its P-enqntiimer as aescribed by Acams et al. (S. Adams wt al., J. Pharm. Pharkacum., 28, 1976, 256; A. J. Hutt aub H. Caldwell, Chemocau Pragmarokinqdics 9, 1984, 371). Moremver, thd chirxl inversiok bh thr metabolism in man mf 2-adyl-propionic acids on the R-(-) ebantiomew to the biolpgically active (S-(+) tnantimmec, espeviajly in case of ibuprofen (R,S)-2-(4-isog
On the other hand, it is known film a low of impurity can formed a film by chemical vapor deposition (CVD method) as a gate insulating and, therefore, a high field-effect mobility can be obtained (refer to Non-Patent Document for example). However, since poly-p-xylylene has a low relative dielectric constant (the relative constant 1 is 3.2), there is a problem in that the threshold voltage increases. Patent Document 1: Japanese Unexamined Application Publication No. 2005-26698 Non-Patent Document 1: Takeshi three other members, “Organic Transistors with Gate Dielectric Films Poly-p-Xylylene Prepared by Vapor Jpn. Appl. Phys., The Society of Applied Physics, October 2003, Vol. 42 (2003), Part 1, No. 10, pp. 6614-6618 Accordingly, it desired to field-effect transistor includes organic film and which a low threshold voltage while a is ensured at the same time. In 1981, (Shen T. in: Wolff, M. F. (ed) Burger's Chemistry, 4th edition, part III, Wiley, Interscience, New pp. 1205-1271) reviewed the medicinal aspects of the aryl-acetic acids and their 2-methyl analogues, especially acids. In particular, it been reported that in anti-inflammatory resides the S-enantiomer is an optically active enantiomer of the racemate (R,S)-2-aryl-propionic acid which up to 150 times as active as its P-enantiomer as Adams al. (S. Adams al., J. Pharm. Pharmacol., 1976, A. J. Hutt and Chemical 9, the inversion the metabolism in man 2-aryl-propionic acids of the R-(-) to the biologically active of ibuprofen (R,S)-2-(4-isob
On the other hand, it is known thAt a film havIng a lOw cOntEnT of iMpurIty can be obtainED by uSing poly-p-xylylene formeD into A fILm by A ChEmicaL vapor dEPoSITioN mEtHod (cVd MeThod) aS a gAte insuLating film And, ThErefore, a high FIeLd-effect moBilIty can be obtaIneD (refer To non-pAtent docUment 1, For exaMPle). HowEver, since PoLY-p-xylyLEne has a LOW rElatIve dielectric consTAnT (The relative dieLectriC cONsTANt aT 1 kHZ is about 3.2), thErE is a pROblem in THaT THE thREshold voltage Increases.    PaTEnt documeNt 1: japANese UnExamiNeD patEnt ApplicatIon PUblicatioN No. 2005-26698    Non-pAtent DoCUment 1: TaKeshi YAsuDa, tHree OThEr MemBeRS, “OrGAnIc FIEld-effect TrAnSiStors With gATE dielEctRic FIlms oF Poly-p-XylylenE DeRivaTIveS PrepAred bY CheMiCal VaPor depOsitiOn”, jpn. J. Appl. Phys., The japaN Society oF ApPlIed phYsics, oCtober 2003, vol. 42 (2003), parT 1, No. 10, pp. 6614-6618
AcCordingLY, it Is DESIrEd to provide a field-eFfECT tRansistoR which INcLuDEs an orgaNiC thIn fiLM And whIch cAN rEalize a lOw threSHoLd Voltage WhIle a hiGh FieLd-eFfect MObilIty is eNsured at The saME time. In 1981, Shen (SheN t. Y., in: Wolff, M. F. (ed) bUrGER's mEdicInaL Chemistry, 4tH ediTIon, pArt Iii, WIleY, interScienCe, nEw yOrk, pp. 1205-1271) reviewed the medIcInal asPects Of the aryl-acetIc acids and THEIr 2-methyl AnalOGuES, especially the 2-Aryl-pRopionic acIDs. In partIculaR, it has beEn reporteD THat the in VitRo aNti-InfLAMmAtory activity RESideS iN the S-enAntIomer whIch Is aN opTicAlLy active eNantiomeR oF tHe RaCemAte (R,S)-2-ARyl-propiOnIc aCiD whIch is UP to 150 timEs as aCtivE aS iTS P-eNantiomER aS DEscrIbEd By AdAms Et Al. (S. AdAms eT Al., J. pharm. PhArmacol., 28, 1976, 256; A. J. hutT And J. caLdWell, CheMical PharmacoKiNetics 9, 1984, 371). MoreOvEr, tHe chirAL InversioN by the metabolism in man of 2-ARyl-propIonIc aciDs of The R-(-) enantIomEr to thE biOLogicaLly actIve (S-(+) eNaNtiOMEr, espECIaLly In Case of ibupROFen (r,S)-2-(4-isoB
On the other hand, it is k nown thata fil m h avi ng  a l ow c ontent of impu r itycan be obtained by usi ng po ly - p-xy l yl ene f ormed i n to a  fi lm  b y a  c h em icalvap or depo sition met hod  ( CVD method)a sa gate ins ula ting film an d,theref or e,a  high  fi eld-e ffectm obilit y can beob t ained( refer t o No n-Pa tent Document 1,f or example). Howe ver, s in c ep o ly- p-x ylylene ha sa low relativ e  d i e l ect r ic constant ( the relativ e  di electr ic  co n stantat 1kH z  is  about 3.2) , th ere is aproble m  in tha t  the th reshol d v olt agei nc re ase s.   P at ent Doc ument 1:  J ap anese  Une x a m i nedPat entAppli cation Public ati on N o . 2 005-2 6698   N on -Pate nt Doc ument  1 : Takeshi Yasud a, t hree othe r m em ber s,  “Org a nic Fi eld -Ef fect Tr ansisto r s w it h G at e Dielectric Films  o f Po ly-p-Xyl yleneD er iv a tives Pr ep are d by C hemic al V a po r deposi tion”, Jp n.  J. App l.  Phys. ,The  Ja pan S o ciet y of A pplied P hysic s , October 2003 ,  Vol. 42 (200 3 ), P ar t  1,No.  10, pp. 66 14-6 6 18
A ccor d in gly ,  it i s des ir e dt o provide a field-e ff ect tr ansis tor which inc ludes an o r g a nic thin  fil m  a n d which can re alize  a low thr e shold vo ltage  while a  high fie l d -effectmob ili tyise n su red at the sa m e  tim e.  In 198 1,Shen (S hen  T.  Y. , i n:  Wolff, M . F. (ed )Bu rg er 'sMedic i nal Chem is try ,4th  edit i on, pa rt II I, W il ey ,  In terscie n ce , NewYo rk , pp . 1 20 5-127 1) r e vie wed the  medicina l a s pect sof  the ar yl-acetic aci ds  and their  2 -me thyl a n a logues,especially the 2-aryl-p r opionic  ac ids.In p articular , i t hasbee n  repor ted th at th einv i tro a n t i- inf la mmatory ac t i vit y res id es i n the S -enantiomer whichi s a n optically a cti ve e n a nt iom e ro f t he rac e m ate (R,S)-2-ary l-propioni ca ci d which is upto  150 ti mes asactiv e  as its  P-enanti omer as d es crib e d  by  Adams etal. (S.Adams eta l., J .  P harm.  Ph armaco l. , 2 8, 19 76, 25 6 ; A . J.Hutt a nd  J. Ca ldwel l,  Chemica l Pharmacokinetics 9, 1 984, 3 71).Mor eover, th e c h ira l inversi on b y the meta bol ism  in m ano f 2-a ryl- p ro pio n ic ac idso f the R-( - )ena n t io mer to theb i o log icall y a c tive ( S-(+ ) enantiomer, esp e cially in case  ofi b upr ofe n  (R, S) -2-(4-isob
On the_other hand,_it is known that_a film_having_a low_content_of impurity can_be obtained by_using poly-p-xylylene formed into_a film by_a_chemical vapor deposition method (CVD method) as a gate insulating film and, therefore, a_high_field-effect mobility_can_be_obtained (refer to Non-Patent Document_1, for example). However, since_poly-p-xylylene has_a low relative dielectric constant (the relative dielectric_constant_at 1 kHz_is about 3.2), there is a problem in that_the threshold voltage increases.  _ Patent Document_1:_Japanese_Unexamined Patent Application Publication_No. 2005-26698    Non-Patent_Document 1: Takeshi Yasuda, three other_members, “Organic Field-Effect Transistors with Gate Dielectric_Films of Poly-p-Xylylene Derivatives Prepared by_Chemical Vapor deposition”, Jpn. J._Appl. Phys.,_The Japan Society of Applied_Physics, October 2003,_Vol. 42_(2003), Part 1,_No. 10, pp. 6614-6618
Accordingly, it is_desired to provide_a field-effect transistor which includes an_organic_thin film and_which_can_realize a_low threshold voltage_while_a high_field-effect_mobility is ensured at the same_time._In 1981, Shen (Shen T. Y., in:_Wolff, M. F. (ed)_Burger's_Medicinal Chemistry, 4th edition,_part III, Wiley, Interscience, New_York, pp. 1205-1271) reviewed the medicinal_aspects of_the aryl-acetic_acids and their 2-methyl analogues, especially the 2-aryl-propionic acids. In particular,_it has been reported that the_in vitro anti-inflammatory activity_resides in_the_S-enantiomer which is_an_optically active_enantiomer of the racemate (R,S)-2-aryl-propionic acid which_is up_to 150 times as active as_its P-enantiomer as described_by_Adams et al. (S. Adams et_al., J. Pharm. Pharmacol., 28, 1976,_256; A. J. Hutt and_J._Caldwell,_Chemical Pharmacokinetics 9, 1984, 371)._Moreover, the chiral inversion by the_metabolism in man_of 2-aryl-propionic acids of the R-(-) enantiomer_to_the biologically active (S-(+) enantiomer, especially_in_case of ibuprofen (R,S)-2-(4-isob